Year	Percent
1950	28.41058
1955	32.47269
1960	35.33164
1965	36.35276
1970	34.03361
1975	26.65902
1980	34.18878
1985	33.84698
1990	34.91609
1995	34.23997
2000	35.4768
2005	37.74956
2010	37.83819
2015	37.26341
2020	35.776
2025	33.98226
2030	32.2577
2035	31.42651
2040	30.94988
2045	30.51335
2050	29.9876
2055	28.96201
2060	28.03034
2065	27.22793
2070	26.59628
2075	26.08308
2080	25.5906
2085	25.06842
2090	24.54078
2095	24.05777
2100	23.66929