Year	Percent
1950	10.87854
1955	10.04298
1960	10.14935
1965	11.94247
1970	12.19347
1975	12.27287
1980	12.39956
1985	12.59963
1990	12.73458
1995	12.41718
2000	12.28818
2005	12.57971
2010	12.90923
2015	12.52818
2020	12.0285
2025	11.52783
2030	11.37176
2035	11.17333
2040	10.84977
2045	10.43078
2050	10.03035
2055	9.69232
2060	9.38804
2065	9.08736
2070	8.76324
2075	8.44679
2080	8.14961
2085	7.85659
2090	7.58918
2095	7.32281
2100	7.05908