Year 	Dist 
1896 	13.71 
1900 	14.47 
1904	14.35
1908 	14.92 
1912 	14.64 
1920 	14.50 
1924 	15.53 
1928 	15.21 
1932 	15.72 
1936 	16.00 
1948 	15.40 
1952 	16.22 
1956 	16.35 
1960 	16.81 
1964 	16.85 
1968 	17.39
1972 	17.35
1976 	17.29
1980 	17.35
1984 	17.25
1988 	17.61
1992 	18.17
1996	18.09
2000 	17.71
2004 	17.79
2008	17.67
2012	17.81
2016	17.86