1969 2.051522 0.487443 5.5714% 1968 4.488285 0.222802 5.0148% 1967 2.458954 0.406677 2.5719% 1966 0.833318 1.200022 3.5485% 1965 0.625933 1.597616 2.7360% 1964 0.916443 1.091175 1.5423% 1963 2.817513 0.354923 1.5697% 1962 2.472914 0.404381 2.2421% 1961 2.066203 0.483979 0.9709% 1960 2.073885 0.482187 1.6442% 1959 2.140853 0.467104 2.3579% 1958 0.121009 8.263828 2.0623% 1957 4.343470 0.230231 3.5571% 1956 0.867282 1.153028 3.3098% 1955 0.129648 7.713211 3.4226% 1954 2.038807 0.490483
gravel