Year	Percent
1950	11.25689
1955	11.56836
1960	11.69272
1965	11.73139
1970	11.83301
1975	12.06885
1980	12.31517
1985	12.63774
1990	12.93947
1995	13.262
2000	12.85326
2005	12.07879
2010	11.82332
2015	12.22326
2020	12.34781
2025	11.92401
2030	11.38885
2035	10.98135
2040	10.72537
2045	10.47931
2050	10.19228
2055	9.86683
2060	9.52781
2065	9.23535
2070	8.95394
2075	8.70778
2080	8.44909
2085	8.18566
2090	7.93933
2095	7.70703
2100	7.46432