Year	Percent
1950	9.77123
1955	10.93948
1960	10.67456
1965	10.43858
1970	10.82845
1975	11.31793
1980	11.60591
1985	11.80226
1990	12.06987
1995	12.09332
2000	12.21988
2005	12.31046
2010	12.25828
2015	12.13967
2020	12.09028
2025	11.92584
2030	11.62349
2035	11.34109
2040	11.0516
2045	10.75097
2050	10.4494
2055	10.1273
2060	9.80248
2065	9.4924
2070	9.19399
2075	8.92618
2080	8.64536
2085	8.37936
2090	8.11914
2095	7.8804
2100	7.63765