Year	Percent
1950	14.03409
1955	14.76518
1960	12.79264
1965	12.08347
1970	11.97445
1975	12.92855
1980	12.56242
1985	11.51278
1990	11.01095
1995	10.29355
2000	10.64823
2005	10.49582
2010	10.33419
2015	10.65945
2020	9.71654
2025	9.05165
2030	8.64061
2035	8.44898
2040	8.31777
2045	8.12271
2050	7.77953
2055	7.36991
2060	6.99007
2065	6.71272
2070	6.52466
2075	6.35181
2080	6.15913
2085	5.93018
2090	5.69956
2095	5.50638
2100	5.36168