Year	Percent
1950	15.90057
1955	15.94325
1960	15.77183
1965	15.66539
1970	15.67855
1975	15.95882
1980	15.59518
1985	14.58037
1990	14.74196
1995	14.97325
2000	15.9159
2005	17.01843
2010	17.51071
2015	18.1229
2020	19.27495
2025	20.85091
2030	22.48161
2035	22.93315
2040	22.34429
2045	21.71269
2050	21.29899
2055	22.81706
2060	24.20102
2065	24.90427
2070	25.1682
2075	24.5696
2080	24.59831
2085	24.96805
2090	25.30186
2095	25.28106
2100	24.94757