Year	Percent
1950	9.70858
1955	10.12308
1960	14.31142
1965	15.74224
1970	16.34068
1975	14.36781
1980	13.71972
1985	13.46696
1990	13.74295
1995	14.15394
2000	13.49785
2005	10.98422
2010	9.20204
2015	9.77622
2020	9.92961
2025	9.2638
2030	8.21387
2035	7.37615
2040	7.01457
2045	6.90506
2050	6.76434
2055	6.45114
2060	6.09342
2065	5.82508
2070	5.70662
2075	5.66771
2080	5.62056
2085	5.51984
2090	5.38102
2095	5.26001
2100	5.19315