Year	Percent
1950	11.69715
1955	12.05205
1960	11.896
1965	11.82575
1970	12.33194
1975	12.12593
1980	11.16687
1985	10.70717
1990	12.02554
1995	12.14173
2000	11.95604
2005	11.65952
2010	8.13843
2015	5.82548
2020	6.03721
2025	6.93269
2030	6.76802
2035	6.16923
2040	5.38639
2045	4.90657
2050	4.77606
2055	4.84314
2060	4.84832
2065	4.68773
2070	4.44105
2075	4.25671
2080	4.22549
2085	4.31379
2090	4.41902
2095	4.44758
2100	4.39793