Year	Percent
1950	11.66277
1955	11.64797
1960	12.21638
1965	12.81844
1970	13.20412
1975	13.6505
1980	13.82451
1985	13.85852
1990	14.3726
1995	14.17319
2000	13.79749
2005	13.89915
2010	14.12498
2015	14.58545
2020	14.12437
2025	13.09582
2030	12.90255
2035	12.70042
2040	12.18282
2045	11.41932
2050	10.69014
2055	10.11036
2060	9.64154
2065	9.2225
2070	8.78364
2075	8.34366
2080	7.91914
2085	7.54778
2090	7.24635
2095	6.98152
2100	6.74294