Year	Percent
1950	12.24732
1955	12.31562
1960	12.48445
1965	12.09347
1970	12.32484
1975	12.42514
1980	12.51305
1985	12.66275
1990	12.75521
1995	12.75507
2000	12.77238
2005	12.58888
2010	12.41177
2015	12.71882
2020	12.78012
2025	12.70562
2030	12.26739
2035	11.908
2040	11.63438
2045	11.3685
2050	11.05077
2055	10.69028
2060	10.30311
2065	9.94534
2070	9.61993
2075	9.29142
2080	8.98052
2085	8.66619
2090	8.36147
2095	8.07748
2100	7.81884