Year	Percent
1950	11.5802
1955	11.21064
1960	10.94497
1965	12.07597
1970	11.89962
1975	11.73173
1980	12.20592
1985	12.82967
1990	13.18124
1995	13.54495
2000	13.48589
2005	13.12465
2010	12.65016
2015	12.44077
2020	12.75449
2025	12.88095
2030	12.26837
2035	11.66995
2040	11.20852
2045	10.8893
2050	10.61987
2055	10.30646
2060	9.94965
2065	9.56325
2070	9.19865
2075	8.88566
2080	8.60885
2085	8.32798
2090	8.04727
2095	7.76637
2100	7.47191