Year	Percent
1950	11.51811
1955	11.75355
1960	11.57562
1965	11.65931
1970	11.96704
1975	12.14894
1980	12.42292
1985	12.45843
1990	12.9716
1995	13.17296
2000	12.93276
2005	12.82664
2010	12.81384
2015	12.90831
2020	13.02486
2025	12.71061
2030	12.30423
2035	11.92908
2040	11.61057
2045	11.28347
2050	10.92555
2055	10.51671
2060	10.09495
2065	9.71324
2070	9.34068
2075	9.00749
2080	8.68363
2085	8.36013
2090	8.05036
2095	7.7581
2100	7.46577