CENSUS TRANSPORTATION PLANNING PACKAGE (CTPP 2000) Table 1. Profile of Selected 1990 and 2000 Characteristics
Geographic Area: District of Columbia
Subject	1990 Census		Census 2000		Change 1990 to 2000
	Number	Percent	Number	Percent	Number	Percent
POPULATION
Total population	606,900	100.0	572,059	100.0	-34,841	-5.7
In households	565,951	93.3	536,373	93.8	-29,578	-5.2
In group quarters	40,949	6.7	35,686	6.2	-5,263	-12.9
HOUSEHOLD SIZE
Total households	249,034	100.0	248,590	100.0	-444	-0.2
1-person household	102,947	41.3	108,569	43.7	5,622	5.5
2-person household	66,926	26.9	68,022	27.4	1,096	1.6
3-person household	33,466	13.4	31,627	12.7	-1,839	-5.5
4-person household	22,570	9.1	20,468	8.2	-2,102	-9.3
5-or-more-person household	23,125	9.3	19,904	8.0	-3,221	-13.9
Mean number of persons per household	2.27	(X)	2.16	(X)	-0.11	(X)
VEHICLES AVAILABLE1
Total households	249,034	100.0	248,590	100.0	-444	-0.2
No vehicle available	91,624	36.8	90,963	36.6	-661	-0.7
1 vehicle available	103,249	41.5	108,298	43.6	5,049	4.9
2 vehicles available	41,799	16.8	38,996	15.7	-2,803	-6.7
3 vehicles available	9,569	3.8	7,726	3.1	-1,843	-19.3
4 vehicles available	2,234	0.9	1,387	0.6	-847	-37.9
5 or more vehicles available	559	0.2	1,220	0.5	661	118.2
Mean vehicles per household	0.91	(X)	0.89	(X)	-0.02	(X)
WORKERS BY SEX1
Workers 16 years and over	304,428	100.0	260,885	100.0	-43,543	-14.3
Male	148,342	48.7	128,945	49.4	-19,397	-13.1
Female	156,086	51.3	131,940	50.6	-24,146	-15.5
MEANS OF TRANSPORTATION TO WORK
Workers 16 years and over	304,428	100.0	260,884	100.0	-43,544	-14.3
Drove alone	106,694	35.0	100,168	38.4	-6,526	-6.1
Carpooled	36,621	12.0	28,607	11.0	-8,014	-21.9
Public transportation (including taxicab)	111,422	36.6	86,493	33.2	-24,929	-22.4
Bicycle or walked	38,270	12.6	33,820	13.0	-4,450	-11.6
Motorcycle or other means	2,305	0.8	1,866	0.7	-439	-19.0
Worked at home	9,116	3.0	9,930	3.8	814	8.9
TRAVEL TIME TO WORK
Workers who did not work at home	295,312	100.0	250,954	100.0	-44,358	-15.0
Less than 5 minutes	5,642	1.9	3,782	1.5	-1,860	-33.0
5 to 9 minutes	15,940	5.4	12,404	4.9	-3,536	-22.2
10 to 14 minutes	28,367	9.6	23,202	9.2	-5,165	-18.2
15 to 19 minutes	43,081	14.6	34,257	13.7	-8,824	-20.5
20 to 29 minutes	68,582	23.2	57,658	23.0	-10,924	-15.9
30 to 44 minutes	82,078	27.8	71,404	28.5	-10,674	-13.0
45 or more minutes	51,622	17.5	48,247	19.2	-3,375	-6.5
Mean travel time to work (minutes)	27.1	(X)	29.7	(X)	2.6	(X)
TIME LEAVING HOME TO GO TO WORK
Workers who did not work at home	295,312	100.0	250,954	100.0	-44,358	-15.0
5:00 a.m. to 6:59 a.m.	57,776	19.6	43,428	17.3	-14,348	-24.8
7:00 a.m. to 7:59 a.m.	80,051	27.1	65,585	26.1	-14,466	-18.1
8:00 a.m. to 8:59 a.m.	85,275	28.9	75,576	30.1	-9,699	-11.4
9:00 a.m. to 9:59 a.m.	23,891	8.1	24,271	9.7	380	1.6
10:00 a.m. to 11:59 a.m.	10,616	3.6	10,778	4.3	162	1.5
12:00 p.m. to 11:59 p.m.	32,622	11.0	25,918	10.3	-6,704	-20.6
12:00 a.m. to 4:59 a.m.	5,081	1.7	5,398	2.2	317	6.2
1See the entry for this item in the Technical Notes in the root directory or state subdirectories (filename: tech_notes.txt). (X)Not applicable. Source:U.S. Census Bureau. Census of Population and Housing, 1990 and 2000 long-form (sample) data.

CENSUS TRANSPORTATION PLANNING PACKAGE (CTPP 2000) Table 2. Profile of Selected 2000 Characteristics
Geographic Area: District of Columbia
Subject	Census 2000
	Number	Percent
POPULATION BY AGE
Total population	572,059	100.0
Under 16 years	103,018	18.0
16 to 20 years	43,242	7.6
21 to 24 years	41,264	7.2
25 to 44 years	189,647	33.2
45 to 64 years	124,800	21.8
65 years and over	70,088	12.3
Mean age (years)	36.4	(X)
HOUSEHOLD INCOME IN 19991
Total households	248,590	100.0
Less than $15,000	51,533	20.7
$15,000 to 19,999	13,263	5.3
$20,000 to 24,999	15,180	6.1
$25,000 to 49,999	65,903	26.5
$50,000 to 74,999	39,553	15.9
$75,000 to 99,999	22,437	9.0
$100,000 or more	40,721	16.4
Mean household income (dollars)	64,355	(X)
Median household income (dollars)	40,127	(X)
Household Size by Vehicles Available1
Household Size		Mean vehicles per household	Vehicles available
			Total households	No vehicle	1 vehicle	2 vehicles	3 vehicles	4 or more vehicles
Total households		0.89	248,590	90,965	108,300	38,995	7,725	2,605
	Row percent	(X)	100.0	36.6	43.6	15.7	3.1	1.0
	Column percent	(X)	100.0	100.0	100.0	100.0	100.0	100.0
1-person household		0.61	108,570	49,215	54,570	3,960	410	415
	Row percent	(X)	100.0	45.3	50.3	3.6	0.4	0.4
	Column percent	(X)	43.7	54.1	50.4	10.2	5.3	15.9
2-person household		1.06	68,020	18,960	29,400	17,295	1,960	410
	Row percent	(X)	100.0	27.9	43.2	25.4	2.9	0.6
	Column percent	(X)	27.4	20.8	27.1	44.4	25.4	15.7
3-person household		1.11	31,625	9,940	11,650	7,420	2,130	490
	Row percent	(X)	100.0	31.4	36.8	23.5	6.7	1.5
	Column percent	(X)	12.7	10.9	10.8	19.0	27.6	18.8
4-or-more-person household		1.21	40,370	12,850	12,680	10,325	3,230	1,290
	Row percent	(X)	100.0	31.8	31.4	25.6	8.0	3.2
	Column percent	(X)	16.2	14.1	11.7	26.5	41.8	49.5
Means of Transportation to Work by Travel Time to Work1
Means of Transportation		Mean travel time to work (minutes)	Travel time to work
			Workers who did not work at home	Less than 10 minutes	10 to 19 minutes	20 to 29 minutes	30 to 44 minutes	45 or more minutes
Workers who did not work at home		29.7	250,955	16,185	57,460	57,660	71,405	48,245
	Row percent	(X)	100.0	6.4	22.9	23.0	28.5	19.2
	Column percent	(X)	100.0	100.0	100.0	100.0	100.0	100.0
Drove alone		26.6	100,170	5,735	27,540	26,370	26,565	13,955
	Row percent	(X)	100.0	5.7	27.5	26.3	26.5	13.9
	Column percent	(X)	39.9	35.4	47.9	45.7	37.2	28.9
Carpooled		29.0	28,605	1,275	7,005	7,355	8,145	4,825
	Row percent	(X)	100.0	4.5	24.5	25.7	28.5	16.9
	Column percent	(X)	11.4	7.9	12.2	12.8	11.4	10.0
Public transportation (including taxicab)		38.3	86,495	840	8,245	16,995	32,635	27,780
	Row percent	(X)	100.0	1.0	9.5	19.6	37.7	32.1
	Column percent	(X)	34.5	5.2	14.3	29.5	45.7	57.6
Bicycle or walked		16.4	33,820	8,130	14,225	6,645	3,690	1,130
	Row percent	(X)	100.0	24.0	42.1	19.6	10.9	3.3
	Column percent	(X)	13.5	50.2	24.8	11.5	5.2	2.3
Motorcycle or other means		47.1	1,865	205	440	295	370	555
	Row percent	(X)	100.0	11.0	23.6	15.8	19.8	29.8
	Column percent	(X)	0.7	1.3	0.8	0.5	0.5	1.2
1See the entry for this item in the Technical Notes in the root directory or state subdirectories (filename: tech_notes.txt). (X)Not applicable. Source:U.S. Census Bureau. Census of Population and Housing, 1990 and 2000 long-form (sample) data.