Year	Percent
1950	11.34742
1955	11.21808
1960	11.24719
1965	12.23763
1970	12.33133
1975	12.32038
1980	12.30942
1985	12.49132
1990	12.65221
1995	12.44091
2000	11.71194
2005	11.51805
2010	11.79759
2015	11.57447
2020	11.19708
2025	10.65386
2030	10.27552
2035	9.97599
2040	9.69544
2045	9.4227
2050	9.13241
2055	8.85005
2060	8.57435
2065	8.34026
2070	8.12265
2075	7.91191
2080	7.70885
2085	7.49618
2090	7.29581
2095	7.10008
2100	6.91567