Year	Percent
1950	18.59729
1955	20.21007
1960	20.41598
1965	19.51595
1970	18.00309
1975	16.55279
1980	15.35763
1985	14.74378
1990	13.908
1995	13.19222
2000	12.10641
2005	11.62414
2010	11.00173
2015	10.33253
2020	9.58925
2025	8.9176
2030	8.32245
2035	7.79201
2040	7.30691
2045	6.86734
2050	6.48072
2055	6.14387
2060	5.85848
2065	5.61795
2070	5.41531
2075	5.23483
2080	5.08425
2085	4.95758
2090	4.85784
2095	4.78137
2100	4.7226