Year	Percent
1950	9.08411
1955	10.05383
1960	13.26443
1965	14.92297
1970	15.46853
1975	14.24422
1980	13.565
1985	13.41725
1990	13.11247
1995	13.69736
2000	12.87469
2005	10.05527
2010	9.70261
2015	9.47677
2020	11.13985
2025	10.18198
2030	9.02328
2035	8.11657
2040	7.78973
2045	7.84552
2050	7.81555
2055	7.49056
2060	6.9876
2065	6.58038
2070	6.3848
2075	6.33192
2080	6.28522
2085	6.14396
2090	5.92857
2095	5.73166
2100	5.61961