Year	Percent
1950	14.76872
1955	16.55895
1960	16.56388
1965	16.34597
1970	15.92126
1975	15.98009
1980	15.74027
1985	15.23239
1990	14.13493
1995	12.51433
2000	11.60076
2005	11.06739
2010	10.77849
2015	10.53658
2020	9.9189
2025	9.28018
2030	8.70979
2035	8.26246
2040	7.92159
2045	7.60864
2050	7.28013
2055	6.96002
2060	6.67023
2065	6.4443
2070	6.26653
2075	6.10747
2080	5.96506
2085	5.82568
2090	5.70265
2095	5.60457
2100	5.53055