Year	Percent
1950	27.52962
1955	26.56094
1960	26.07931
1965	24.98932
1970	23.98791
1975	24.52653
1980	25.59748
1985	27.39267
1990	29.15815
1995	30.64687
2000	32.99829
2005	35.54648
2010	36.34235
2015	35.17692
2020	32.05362
2025	28.3925
2030	26.96646
2035	27.78093
2040	29.15443
2045	29.94832
2050	28.63312
2055	26.03639
2060	24.38834
2065	23.84673
2070	24.05733
2075	24.27277
2080	23.9666
2085	23.14964
2090	22.20666
2095	21.60241
2100	21.46862