Length of Transportation Routes
Unit: 10 000 km
Year	Length of Railways in		Length of Highways	Length of Navigable Inland Waterways	Length of Civil		Length of Petroleum and Gas Pipelines
	Operation	Electrified Railways			Aviation Routes	International Routes
1952	2.29		12.67	9.50	1.31	0.51
1957	2.67		25.46	14.41	2.64	0.43	...
1962	3.46	0.01	46.35	16.19	3.53	0.44	0.02
1965	3.64	0.01	51.45	15.77	3.94	0.45	0.04
1970	4.10	0.03	63.67	14.84	4.06	0.44	0.12
1975	4.60	0.07	78.36	13.56	8.42	3.71	0.53
1978	4.86	0.10	89.02	13.60	14.89	5.53	0.83
1980	4.99	0.17	88.33	10.85	19.53	8.12	0.87
1985	5.21	0.42	94.24	10.91	27.72	10.60	1.17
1986	5.25	0.44	96.28	10.94	32.43	10.76	1.30
1987	5.26	0.46	98.22	10.98	38.91	14.89	1.38
1988	5.28	0.57	99.96	10.94	37.38	12.83	1.43
1989	5.32	0.64	101.43	10.90	47.19	16.64	1.51
1990	5.34	0.69	102.83	10.92	50.68	16.64	1.59
1991	5.34	0.78	104.11	10.97	55.91	17.74	1.62
1992	5.36	0.84	105.67	10.97	83.66	30.30	1.59
1993	5.38	0.89	108.35	11.02	96.08	27.87	1.64
1994	5.40	0.90	111.78	10.27	104.56	35.19	1.68
1995	5.46	0.97	115.70	11.06	112.90	34.82	1.72
1996	5.67	1.01	118.58	11.08	116.65	38.63	1.93
1997	5.76	1.20	122.64	10.98	142.50	50.44	2.04
1998	5.76	1.30	127.85	11.03	150.58	50.44	2.31
1999	5.79	1.40	135.17	11.65	152.22	52.33	2.49
2000	6.87	1.49	140.27	11.93	150.29	50.84	2.47
2001	7.01	1.69	169.80	12.15	155.36	51.69	2.76
2002	7.19		176.52	12.16	163.77	57.40	2.98