Year	Percent
1950	13.0377
1955	12.40292
1960	13.4455
1965	12.55787
1970	11.22363
1975	10.28752
1980	11.27805
1985	12.3587
1990	11.96689
1995	13.34511
2000	15.8724
2005	20.05996
2010	22.41229
2015	23.95048
2020	24.57452
2025	24.59626
2030	25.3626
2035	26.36363
2040	27.01586
2045	27.03574
2050	27.29558
2055	27.13073
2060	26.84113
2065	26.64197
2070	25.97651
2075	25.3794
2080	24.8353
2085	24.47892
2090	24.25851
2095	24.0746
2100	23.81698