Year	Percent
1950	14.61682
1955	14.90349
1960	14.46407
1965	14.76474
1970	14.89998
1975	15.01838
1980	15.12909
1985	15.16437
1990	15.03003
1995	14.92552
2000	14.84937
2005	14.65076
2010	14.99734
2015	14.99226
2020	14.79265
2025	14.19409
2030	13.69264
2035	13.28288
2040	12.8806
2045	12.42427
2050	11.93322
2055	11.42354
2060	10.95255
2065	10.52536
2070	10.099
2075	9.69831
2080	9.30107
2085	8.92125
2090	8.56837
2095	8.24679
2100	7.93474