km are surfaced with gravel or crushed stone Pipelines:

6.6558% 1976 8.526894 0.117276 6.4073% 1975 1.197991 0.834731 9.8159% 1974 6.749772 0.148153 9.0909% 1973 2.071097 0.482836 6.4509% 1972 0.291665 3.428593 4.7304% 1971 5.481698 0.182425 5.7132% 1970 0.320515 3.119975 5.5272% 1969 0.149929 6.669840 5.5714% 1968 2.968530 0.336867 5.0148% 1967 0.772036 1.295277 2.5719% 1966 0.336859 2.968600 3.5485% 1965 2.253362 0.443781 2.7360% 1964 4.164599 0.240119 1.5423% 1963 1.231961 0.811714 1.5697% 1962 1.074064 0.931043 2.2421% 1961 3.670620 0.272434 0.9709% 1960 0.309001 3.236239 1.6442% 1959 3.848161 0.259864 2.3579% 1958 0.902731 1.107749 2.0623% 1957 2.598283 0.384870 3.5571% 1956 3.305929 0.302487 3.3098% 1955 0.346053 2.889727 3.4226% 1954 0.216816 4.612205 1.5421% 1953 1.704003 0.586853 1.5703% 1952 0.825240 1.211769 1.5948% 1951 0.786833 1.270918 5.0183% 1950 3.983305 0.251048 1.7034% 1949 3.133166 0.319166 -0.4250% 1948 0.897355 1.114386 6.7886% 1947 0.615603 1.624423 13.9149% 1946 2.487351 0.402034 22.7896% 1945 1.663196 0.601252 3.2661% 1944 1.912448 0.522890 1.3234% 1943 0.102442 9.761596 2.7232% 1942 0.092203 10.845653 0.0000% 1926 1.884689 0.530592 -2.0001% 1925 1.315756 0.760019 0.6731% 1924 2.483221 0.402703 2.0549% 1923 1.280643 0.780858 2.8137% 1921 0.142001 7.042228 -2.7367% 1929 0.563682 1.774049 -0.6823% 1927 0.967115 1.034003 0.0000% 1926 2.100047 0.476180 0.0000% 1926 0.979999 1.020409 6.5229% 1941 0.577389 1.731935 6.1527% 1940 0.915483 1.092320 -8.4517% 1930 0.239460 4.176062 -7.1894% 1920 0.515154 1.941167 -13.0688%

premeditating