Year	Percent
1950	12.24676
1955	12.32025
1960	12.31505
1965	11.9744
1970	12.39752
1975	12.75297
1980	12.74947
1985	13.08087
1990	13.34022
1995	13.32609
2000	13.10813
2005	13.06947
2010	13.42119
2015	13.46913
2020	12.9793
2025	12.57832
2030	12.36659
2035	12.15939
2040	11.88797
2045	11.54657
2050	11.18803
2055	10.86725
2060	10.57492
2065	10.30335
2070	9.99259
2075	9.69388
2080	9.40557
2085	9.13715
2090	8.87935
2095	8.61889
2100	8.36004