Historical Statistics of the United States Millennial Edition Online

		Dg221		Dg222	Dg223	Dg224
		Employees		Vehicles	Volume	Customers
Row	Year	Number		Number	Million	Number
1	1907	----	¹	0	----	----
2	1913	30	²	----	----	----
3	1924	200	²	----	----	----
4	1927	435		350	----	----
5	1932	650		----	----	----

6	1934	1,600	²	----	----	----
7	1947	7,000	²	4,050	----	----
8	1949	----		4,055	----	----
9	1950	7,500		----	----	----
10	1951	7,500		----	----	----

11	1952	7,700		4,696	----	----
12	1954	----		5,000	----	----
13	1955	----		5,612	----	----
14	1957	----		6,400	----	23,000
15	1958	10,000		6,636	----	28,000

16	1959	11,083		7,207	183	----
17	1960	13,000		8,511	----	46,000
18	1961	13,040		9,123	207	52,000
19	1962	15,000		9,875	----	60,000
20	1963	17,300		11,035	250	73,000

21	1964	21,000		13,000	296	86,000
22	1965	24,000		15,000	342	100,000
23	1966	29,000		17,000	374	113,000
24	1967	30,400		18,000	409	125,000
25	1968	33,731		20,000	421	139,000

26	1969	41,168		22,400	514	----
27	1970	45,371		24,500	553	----
28	1971	53,195		27,600	608	200,000
29	1972	58,642		30,100	712	250,000
30	1973	67,398		33,900	798	280,000

31	1974	67,900	²	37,600	837	308,000
32	1975	79,700	²	40,400	930	351,000
33	1976	86,200		45,400	950	388,000
34	1977	99,200		47,900	1,178	426,000
35	1978	103,100		51,700	1,309	469,000

36	1979	114,000		58,200	1,437	508,000
37	1980	111,000		59,300	1,495	538,000
38	1981	114,300		60,900	1,588	573,000
39	1982	117,800		62,400	1,625	604,000
40	1983	124,200		63,400	1,781	645,000

41	1984	141,100		72,400	1,956	669,000
42	1985	152,400		80,200	2,061	740,000
43	1986	168,200		85,500	2,261	804,000
44	1987	191,600		94,700	2,492	872,000
45	1988	219,400		103,700	2,685	933,000

46	1989	237,700		116,000	2,778	1,007,000
47	1990	246,800		122,000	2,860	1,054,000
48	1991	256,000		129,000	2,886	1,119,000
49	1992	265,000		131,000	2,941	1,209,000
50	1993	286,000		----	2,945	1,289,000

51	1994	320,000		135,000	3,028	1,350,000
52	1995	337,000		147,000	3,090	1,450,000
53	1996	338,000		157,000	3,150	1,460,000