Year	Percent
1950	10.05281
1955	9.65086
1960	9.35177
1965	8.93917
1970	11.49908
1975	11.24097
1980	10.6669
1985	11.62734
1990	11.46568
1995	11.68786
2000	12.52141
2005	12.47505
2010	12.67951
2015	12.42519
2020	11.1706
2025	9.81983
2030	9.19271
2035	9.3322
2040	9.47114
2045	9.29385
2050	8.64322
2055	7.80103
2060	7.2354
2065	7.10248
2070	7.18533
2075	7.16787
2080	6.89353
2085	6.4532
2090	6.09105
2095	5.95843
2100	6.00114