1980 | 1985 | 1990 | 1995 | 2000 | 2005 | 2010 | 2014 | |
Length of railways in operation (km) | 53,300 | 55,200 | 57,900 | 62,400 | 68,700 | 75,400 | 91,200 | 111,800 |
Length of national railways in operation (km) | 49,900 | 52,100 | 53,400 | 54,600 | 58,700 | 62,200 | 66,200 | 67,000 |
Length of electrified national railways (km) | 1700 | 4100 | 6900 | 9700 | 14,900 | 19,400 | 32,700 | 36,900 |
As percent of length of national railways in operation (per cent) | 3.41 | 7.87 | 12.92 | 17.77 | 25.38 | 31.19 | 49.4 | 55.07 |
Length of national railways with double-tracks (km) | 8100 | 10,000 | 13,000 | 16,900 | 21,400 | 24,500 | 29,700 | 32,500 |
As percent of length of national railways in operation (per cent) | 16.23 | 19.19 | 24.34 | 30.95 | 36.46 | 39.39 | 44.86 | 48.51 |