Year	Percent
1950	12.1967
1955	12.47758
1960	12.49033
1965	12.08971
1970	12.14645
1975	12.26121
1980	12.35419
1985	12.34638
1990	12.36345
1995	12.43415
2000	12.50398
2005	12.5154
2010	12.41135
2015	12.65758
2020	12.98549
2025	13.07293
2030	12.75427
2035	12.3818
2040	12.05891
2045	11.71811
2050	11.31841
2055	10.83445
2060	10.33579
2065	9.86111
2070	9.40915
2075	9.01008
2080	8.59712
2085	8.20395
2090	7.83815
2095	7.484
2100	7.16905