1959 2.202955 0.453936 2.3579% 1958 0.201489 4.963044 2.0623% 1957 1.993191 0.501708 3.5571% 1956 2.212634 0.451950 3.3098% 1955 0.145836 6.857013 3.4226% 1954 3.506459 0.285188 1.5421% 1953 0.583345 1.714252 1.5703% 1952 0.096059 10.410310 1.5948% 1951 0.893219 1.119546 5.0183% 1950 0.569050 1.757313 1.7034% 1949 1.535943 0.651066 -0.4250% 1948 3.522606 0.283881 6.7886% 1947 1.398756 0.714921 13.9149% 1946 2.455772 0.407204 22.7896% 1945 0.506401 1.974720 3.2661% 1944 1.610592 0.620890 1.3234% 1943 1.198394 0.834450 2.7232% 1942 1.000000 1.000000
abrasiveness