Year	Percent
1950	11.45384
1955	11.06469
1960	9.55091
1965	9.86935
1970	8.86677
1975	10.16555
1980	11.56924
1985	11.60987
1990	11.95337
1995	12.67362
2000	12.43562
2005	12.49153
2010	12.86122
2015	13.02067
2020	13.00159
2025	12.92008
2030	12.55096
2035	12.1227
2040	11.68732
2045	11.25349
2050	10.79186
2055	10.2804
2060	9.76081
2065	9.27965
2070	8.86504
2075	8.50071
2080	8.18221
2085	7.88037
2090	7.59734
2095	7.34518
2100	7.13845