Year	Percent
1950	5.67176
1955	5.65395
1960	5.66878
1965	8.31266
1970	10.77002
1975	11.22619
1980	10.77019
1985	10.35628
1990	10.45363
1995	12.69079
2000	10.68287
2005	11.67738
2010	10.37287
2015	10.5461
2020	11.26758
2025	11.213
2030	10.83891
2035	10.28717
2040	9.97283
2045	9.78535
2050	9.56639
2055	9.29162
2060	9.00789
2065	8.71098
2070	8.42836
2075	8.15652
2080	7.9217
2085	7.70715
2090	7.49825
2095	7.28126
2100	7.08142