NATIONAL ROADS BY SURFACE TYPE
	1981 to 2000
	(In kilometers)
	Year	All types	Earth	Gravel	Asphalt	Concrete
	1981	23,488.72	928.12	12,324.98	4,912.88	5,322.74
	1982	23,783.44	886.40	12,431.34	4,918.44	5,547.26
	1983	24,140.47	594.94	12,755.73	5,078.66	5,711.14
	1984	25,116.74	651.19	13,419.89	5,316.34	5,729.32
	1985	26,190.52	833.10	13,612.57	5,608.17	6,136.68
	1986	26,229.68	747.13	13,702.00	5,618.34	6,162.21
	1987	26,082.35	708.34	13,400.32	5,793.64	6,180.05
	1988	26,070.05	730.06	13,250.24	5,874.84	6,214.91
	1989	26,110.08	304.19	13,296.26	5,952.75	6,556.88
	1990	26,272.03	208.82	13,321.18	6,011.16	6,730.87
	1991	26,421.88	225.72	12,769.70	6,371.21	7,055.25
	1992	26,554.43	215.90	12,709.21	6,379.42	7,249.90
	1993	26,593.60	216.30	12,719.22	6,387.64	7,270.44
	1994	26,658.76	214.04	12,622.70	6,374.69	7,447.33
	1995	26,720.25	128.50	12,622.85	6,394.72	7,574.18
	1996	27,369.37	352.84	11,861.85	6,806.03	8,348.65
	1997	27,649.87	380.68	11,575.27	6,893.67	8,800.25
	1998	27,893.21	379.80	11,486.48	6,732.90	9,294.03
	1999	28,522.69	386.94	11,512.43	6,882.34	9,740.97
	2000	29,055.84	611.94	11,424.00	6,683.81	10,336.09
	Source: Department of Public Works and Highways