Year	Percent
1950	14.92431
1955	13.05593
1960	12.49868
1965	12.48088
1970	12.40126
1975	12.69117
1980	12.64798
1985	12.20673
1990	12.21949
1995	13.25953
2000	14.17537
2005	14.99982
2010	16.06832
2015	16.98798
2020	18.86564
2025	21.59703
2030	23.87089
2035	25.40291
2040	25.78493
2045	25.15833
2050	24.85704
2055	25.24609
2060	25.75745
2065	26.23682
2070	26.32322
2075	25.84693
2080	25.40469
2085	25.11941
2090	24.95845
2095	24.79995
2100	24.56034