Year	Percent
1950	9.08033
1955	9.66657
1960	9.93762
1965	10.23453
1970	10.93205
1975	12.19718
1980	12.82066
1985	13.30659
1990	13.78569
1995	13.93167
2000	13.57615
2005	12.9168
2010	12.00048
2015	11.77981
2020	12.26939
2025	11.68068
2030	10.75514
2035	10.07601
2040	9.61469
2045	9.29511
2050	8.99876
2055	8.65674
2060	8.25111
2065	7.83721
2070	7.47957
2075	7.18839
2080	6.94269
2085	6.69684
2090	6.45675
2095	6.22831
2100	6.02747