Basic Statistics on National Railways in Operation
Item	1995	2000	2001	2002	2003	2004
Length of Railways in Operation (km)	54616	58656	59079	59530	60446	74200
In Formal Operation	50866	51262	54013	54422	56238
In Temporary Operation	3750	7394	5066	5108	4208
Proportion of the Length in Formal Operation (%)	93.1	87.4	91.4	91.4	93.0
Double-Tracking Length (km)	16909	21408	22640	23058	23702
As Percentage of the Length of Railways in Operation (%)	31.0	36.5	38.3	38.7	39.2
Length of Electrified Railways (km)	9703	14864	16877	17409	18060
As Percentage of Railways in Operation (%)	17.8	25.3	28.6	29.2	29.9
Length of Diesel Engine Routes (km)	24749	39497	40466	42121	42387
As Percentage of Railways in Operation (%)	45.3	67.3	68.5	70.8	70.1
Length Under Centralized Traffic Control (km)	1226	1200	1163	1401	1842
As Percentage of Railways in Operation (%)	2.2	2.0	2.0	2.4	3.1
Automatic Blocking Length (km)	12910	18318	18845	20682	21920
As Percentage of Railways in Operation (%)	23.6	31.2	31.9	34.7	36.3
Semi-automatic Blocking Length (km)	40859	41695	41336	39990	39522
As Percentage of Railways in Operation (%)	74.8	71.1	70.0	67.2	65.4
Length of Continuous Welded Rails (km)	21854	29975	32502	35967	39497
As Percentage of Trunk Lines (%)	40.0	51.1	39.0	42.7	46.0
Number of Stations with Electric Interlocking (unit)	4587	5232	5288	5278	5204
As Percentage of Railways Stations in Operation (%)	73.9	90.4	91.6	91.8	92.9