Year	Percent
1950	8.31207
1955	7.705
1960	7.06031
1965	8.8106
1970	10.06328
1975	10.15956
1980	10.01846
1985	9.4574
1990	9.02699
1995	8.19023
2000	8.10319
2005	8.5516
2010	8.76224
2015	8.39933
2020	8.09112
2025	7.31533
2030	6.94607
2035	6.78066
2040	6.68872
2045	6.49504
2050	6.20856
2055	5.89697
2060	5.63727
2065	5.46921
2070	5.36796
2075	5.26572
2080	5.12407
2085	4.96999
2090	4.83974
2095	4.7586
2100	4.71957