Year	Percent
1950	10.27988
1955	8.994
1960	8.08977
1965	10.40777
1970	10.33893
1975	10.83008
1980	10.63233
1985	10.49175
1990	9.85986
1995	10.52019
2000	11.33425
2005	11.68278
2010	10.07795
2015	8.79485
2020	8.75102
2025	8.87278
2030	10.40504
2035	9.4696
2040	8.58932
2045	8.10495
2050	8.11262
2055	8.21208
2060	8.00289
2065	7.63535
2070	7.2662
2075	6.99893
2080	6.83568
2085	6.66277
2090	6.44794
2095	6.21204
2100	6.00444