Year	Percent
1950	13.95492
1955	13.76385
1960	14.16413
1965	14.91223
1970	14.99755
1975	14.90307
1980	14.83621
1985	14.72127
1990	14.70076
1995	14.62385
2000	14.18598
2005	13.8708
2010	13.57105
2015	13.28741
2020	13.14464
2025	12.65046
2030	12.14424
2035	11.67122
2040	11.26401
2045	10.90944
2050	10.56433
2055	10.215
2060	9.86438
2065	9.5323
2070	9.22576
2075	8.93734
2080	8.66198
2085	8.40714
2090	8.1669
2095	7.90567
2100	7.67572