Year	Percent
1950	9.98258
1955	10.6056
1960	10.51456
1965	10.11963
1970	9.93194
1975	9.94601
1980	11.14695
1985	11.26281
1990	10.87342
1995	10.72386
2000	10.52639
2005	11.13788
2010	11.98617
2015	11.30696
2020	10.23159
2025	10.07018
2030	10.07909
2035	9.94765
2040	9.58123
2045	9.11739
2050	8.69786
2055	8.37995
2060	8.13286
2065	7.8836
2070	7.60235
2075	7.29486
2080	7.01599
2085	6.76352
2090	6.54693
2095	6.34145
2100	6.14149