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