Year	Percent
1950	11.88272
1955	10.67603
1960	11.93219
1965	12.60414
1970	13.64844
1975	13.94261
1980	12.48926
1985	10.59482
1990	10.97056
1995	11.90403
2000	12.44817
2005	11.66748
2010	11.84585
2015	9.6115
2020	11.12799
2025	10.91782
2030	10.62753
2035	10.149
2040	9.51317
2045	9.00609
2050	8.92607
2055	9.03128
2060	8.90782
2065	8.56136
2070	8.12646
2075	7.76603
2080	7.58347
2085	7.51919
2090	7.42715
2095	7.19816
2100	6.88206