Year	Percent
1950	14.76646
1955	13.50872
1960	12.6861
1965	11.61185
1970	10.28217
1975	10.89299
1980	9.72964
1985	10.22989
1990	13.30445
1995	13.78662
2000	17.59378
2005	17.72376
2010	18.58721
2015	18.75823
2020	20.60405
2025	22.32991
2030	25.90936
2035	28.39717
2040	29.17036
2045	27.96033
2050	25.86518
2055	25.07866
2060	25.30845
2065	25.48041
2070	25.59691
2075	25.14699
2080	24.44969
2085	23.85637
2090	23.47796
2095	23.38162
2100	23.36488