Year	Percent
1950	11.46682
1955	11.17133
1960	10.94476
1965	11.96008
1970	11.86613
1975	11.74831
1980	12.14019
1985	12.71248
1990	13.02289
1995	13.33636
2000	13.15832
2005	12.77286
2010	12.28883
2015	12.08183
2020	12.40556
2025	12.54349
2030	11.94557
2035	11.36562
2040	10.92071
2045	10.61344
2050	10.354
2055	10.05478
2060	9.71053
2065	9.33522
2070	8.98018
2075	8.67556
2080	8.40594
2085	8.13329
2090	7.86175
2095	7.59056
2100	7.30757