Year	Percent
1950	10.63783
1955	10.36501
1960	10.24712
1965	10.64653
1970	10.37665
1975	11.13354
1980	10.51697
1985	9.59214
1990	7.83594
1995	6.85003
2000	6.9935
2005	7.27645
2010	7.82526
2015	7.50781
2020	6.60085
2025	5.86618
2030	5.60187
2035	5.76149
2040	6.0078
2045	6.0379
2050	5.80853
2055	5.49592
2060	5.3058
2065	5.3091
2070	5.41186
2075	5.4847
2080	5.43192
2085	5.27537
2090	5.11822
2095	5.03736
2100	5.03364