| 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | |
| Total number | 2 968 | 2 961 | 2 973 | 2 923 | 2 851 | 2 829 |
| by source of power | ||||||
| electric | 1 097 | 1 092 | 1 089 | 1 073 | 1 051 | 1 029 |
| diesel | 1 855 | 1 853 | 1 866 | 1 831 | 1 780 | 1 778 |
| steam | 16 | 16 | 18 | 19 | 20 | 22 |
| Tractive power total (1000 kW) | 4 521 | 4 480 | 4 062 | 4 066 | 3 977 | 3 894 |
| by source of power | ||||||
| electric | 2 803 | 2 782 | 2 425 | 2 390 | 2 339 | 2 292 |
| diesel | 1 705 | 1 685 | 1 622 | 1 661 | 1 623 | 1 585 |
| steam | 13 | 13 | 15 | 15 | 15 | 17 |
Source: transport statistics of the MDS