_id	locomotives	passenger	Train-miles	Car-miles	miles	trip length	(Btu per revenue	(trillion
1	 in service	cars	(thousands)	(thousands)	(millions)	(miles)	passenger-mile)	Btu) a
2	b	1165.0	16537.0	140147.0	1993.0	188.0	b	b
3	285.0	1571.0	26302.0	213261.0	3039.0	183.0	b	b
4	352.0	1777.0	27151.0	239775.0	3807.0	224.0	3381.9151171910025	12.874950851146147
5	457.0	1848.0	29538.0	260060.0	4259.0	233.0	2917.2993060490057	12.424777744462714
6	355.0	1913.0	30166.0	253898.0	3753.0	224.0	3310.6255647382663	12.424777744462714
7	379.0	2062.0	30885.0	263589.0	4268.0	229.0	3058.814454971771	13.055020093819518
8	369.0	2154.0	33200.0	261325.0	4204.0	221.0	3212.462702308028	13.50519320050295
9	441.0	2084.0	32451.0	255214.0	4154.0	217.0	3316.152398775399	13.775297064513008
10	437.0	2026.0	31379.0	255129.0	4867.0	226.0	3126.330595007189	15.215851005899989
11	448.0	2128.0	29487.0	235235.0	4503.0	217.0	2859.194059770408	12.874950851146147
12	398.0	1830.0	30380.0	222753.0	4397.0	226.0	2414.156157353742	10.615044623884403
13	396.0	1929.0	28833.0	217385.0	3993.0	220.0	2550.975043555291	10.186043348916277
14	388.0	1880.0	28805.0	223509.0	4227.0	223.0	2359.367677743235	9.973047173820655
15	387.0	1844.0	29133.0	234557.0	4427.0	227.0	2417.4493898325686	10.70204844878878
16	382.0	1818.0	30038.0	250642.0	4785.0	238.0	2236.920962633229	10.703666806200001
17	369.0	1793.0	28604.0	249665.0	5011.0	249.0	2037.3521628385552	10.209171687984
18	381.0	1850.0	29515.0	261054.0	5361.0	259.0	1989.14662909681	10.663815078588
19	391.0	1845.0	30221.0	277774.0	5686.0	265.0	1967.1974230770313	11.185484547616
20	312.0	1742.0	31000.0	285255.0	5859.0	274.0	2082.099391234681	12.199020333243999
21	318.0	1863.0	33000.0	300996.0	6057.0	273.0	2051.725406284299	12.427300785864
22	316.0	1786.0	34000.0	312484.0	6273.0	285.0	2011.2801891796587	12.616760626724
23	336.0	1796.0	34000.0	307282.0	6091.0	286.0	2117.2575107299294	12.896215497856
24	360.0	1853.0	34936.0	302739.0	6199.0	280.0	2141.7218607962577	13.3 c
25	411.0	1874.0	34940.0	305600.0	5869.0	276.0	1917.0	11.3
26	422.0	1907.0	31579.0	282579.0	5401.0	266.0	2071.0	11.2
27	348.0	1501.0	30542.0	277750.0	5066.0	257.0	2194.0	11.1
28	292.0	1572.0	32000.0	287760.0	5166.0	255.0	2289.0	11.8
29	362.0	1347.0	32926.0	315823.0	5325.0	251.0	2246.0	12.0
30	385.0	1285.0	34080.0	349337.0	5289.0	245.0	2362.0	12.5
31	385.0	1891.0	35404.0	371215.0	5574.0	243.0	2651.0	14.8
32	401.0	2084.0	36512.0	377705.0	5571.0	238.0	2690.0	15.0
33	372.0	2896.0	37624.0	378542.0	5314.0	228.0	2537.0	13.5
34	442.0	1623.0	37459.0	331864.0	5680.0	231.0	2145.0	12.2
35	276.0	1211.0	37159.0	308437.0	5511.0	219.0	2068.0	11.4
36	258.0	1186.0	36199.0	264796.0	5381.0	215.0	2025.0	10.9
37	319.0	1191.0	36083.0	263908.0	5410.0	220.0	1948.0	10.5
38	270.0	1164.0	37484.0	266545.0	5784.0	218.0	1824.0	10.5
39	278.0	1177.0	37736.0	271762.0	6179.0	215.0	1745.0	10.8
40	274.0	1214.0	38300.0	282764.0	5914.0	217.0	1773.0	10.5
41	282.0	1274.0	37453.0	294820.0	6420.0	220.0	1668.0	10.7
42	287.0	1301.0	37090.0	296315.0	6670.0	213.0	1628.0	10.7
43	485.0	2090.0	37640.0	319088.0	6804.0	217.56495157210784	1560.8393432092037	10.619950891195423
44	418.0	1447.0	38410.0	324949.0	6810.0	217.56495157210784	1608.072301416787	10.95097237264832
45	428.0	1419.0	38013.0	324683.0	6675.0	217.56495157210784	1628.837325140691	10.872489145314113
46	423.0	1428.0	37798.0	319464.0	6536.0	217.56495157210784	1588.7382323592753	10.383993086700224
47	434.0	1402.0	37808.0	316384.0	6520.0	207.59236400635606	1550.7759283036607	10.111059052539868
48	419.0	1405.0	37859.0	316148.0	6563.0	205.0618124683733	1524.3490323627764	10.004302699396902
49	431.0	1403.0	37825.0	272540.0	6363.0	200.0583149287255	1579.342306977212	10.049355099296
50	403.0	1415.0	38205.0	278889.0	6478.786	198.35475537479846	1506.056478358754	9.757417627199999
51	""	""	""	""	""	""	""	""
52	b	0.004058388965118009	0.01759818209002484	0.01443912607402198	0.02486433958457246	0.001117606526166215	b	b
53	0.0393347505571624	0.0154388502666849	-0.00024831907242128803	-0.001378925834811029	0.009162796311376065	-0.008943787466778375	-0.016189650103855646	-0.00717519625873364
54	""	""	""	""	""	""	""	""
55	""	""	""	""	""	""	""	""
56	""	""	""	""	""	""	""	""
57	""	""	""	""	""	""	""	""
58	""	""	""	""	""	""	""	""
59	""	""	""	""	""	""	""	""
60	""	""	""	""	""	""	""	""
61	""	""	""	""	""	""	""	""
62	""	""	""	""	""	""	""	""
63	""	""	""	""	""	""	""	""
64	""	""	""	""	""	""	""	""
65	""	""	""	""	""	""	""	""
66	""	""	""	""	""	""	""	""