Year	Percent
1950	9.83699
1955	9.80689
1960	9.57881
1965	9.47473
1970	9.47644
1975	9.40757
1980	9.66473
1985	9.87214
1990	10.09084
1995	10.46136
2000	11.09257
2005	11.19274
2010	10.77909
2015	10.4281
2020	10.64696
2025	10.85828
2030	10.75526
2035	10.40182
2040	10.07963
2045	9.7806
2050	9.53424
2055	9.28028
2060	9.02205
2065	8.74396
2070	8.45936
2075	8.18346
2080	7.93681
2085	7.71701
2090	7.49165
2095	7.27005
2100	7.05435