Historical Statistics of the United States Millennial Edition Online

		Dh219	Dh220	Dh221	Dh222	Dh223
		Electric light and power	Manufactured gas	Natural gas	Combined electric and gas (weighted indexes)
		Output	Output per worker
Row	Year	Index 1929=100	Index 1929=100	Index 1929=100	Index 1929=100	Index 1929=100
1	1899	----	15.6	17.0	----	----
2	1900	----	----	18.1	----	----
3	1901	----	23.7	20.2	----	----
4	1902	3.6	21.6	21.5	7.6	38.0
5	1903	----	24.7	22.8	----	----

6	1904	----	26.6	23.7	----	----
7	1905	----	27.0	26.8	----	----
8	1906	----	30.2	29.7	----	----
9	1907	7.5	33.3	32.5	13.4	47.0
10	1908	----	35.9	33.2	----	----

11	1909	----	38.0	38.1	----	----
12	1910	----	39.6	41.2	----	----
13	1911	----	42.2	41.9	----	----
14	1912	13.0	47.3	46.1	21.0	51.8
15	1913	13.6	50.0	46.2	21.9	----

16	1914	15.2	52.8	48.4	23.9	----
17	1915	16.6	53.1	51.6	25.3	----
18	1916	21.1	58.8	59.5	30.4	----
19	1917	24.5	65.8	63.7	34.6	69.9
20	1918	31.4	66.0	60.5	39.6	----

21	1919	36.0	71.2	60.8	44.1	82.4
22	1920	39.3	71.6	65.4	47.1	----
23	1921	36.3	69.2	52.3	43.3	----
24	1922	41.2	73.2	59.4	48.3	----
25	1923	50.0	79.5	64.7	56.4	----

26	1924	54.9	82.0	68.2	60.8	----
27	1925	63.5	83.6	69.2	67.4	84.9
28	1926	73.5	92.2	76.4	77.0	----
29	1927	81.7	97.3	80.2	84.2	----
30	1928	89.5	98.2	87.3	90.7	----

31	1929	100.0	100.0	100.0	100.0	100.0
32	1930	103.5	100.6	102.3	102.9	102.5
33	1931	101.9	98.0	99.9	101.0	107.5
34	1932	92.7	90.6	94.9	92.6	111.4
35	1933	92.8	85.4	92.1	91.5	113.3

36	1934	99.2	85.9	100.0	97.1	115.0
37	1935	108.2	85.9	107.9	104.5	121.3
38	1936	123.4	81.0	124.8	116.4	126.3
39	1937	136.3	81.9	132.1	126.3	130.7
40	1938	136.8	81.9	126.0	125.9	134.4

41	1939	151.6	83.6	135.8	137.5	147.0
42	1940	167.7	88.5	150.0	151.4	157.2
43	1941	190.5	90.9	159.9	168.4	172.6
44	1942	212.0	96.8	178.4	186.6	209.0