Year	Percent
1950	9.81098
1955	9.96601
1960	10.08729
1965	10.05537
1970	9.97881
1975	9.97218
1980	10.12276
1985	10.34118
1990	10.69779
1995	11.18194
2000	11.32625
2005	11.04261
2010	10.37727
2015	10.22989
2020	10.68582
2025	10.88394
2030	10.57726
2035	10.16883
2040	9.87769
2045	9.72371
2050	9.57653
2055	9.38086
2060	9.14361
2065	8.88448
2070	8.66501
2075	8.45319
2080	8.27123
2085	8.07367
2090	7.86794
2095	7.67122
2100	7.48282