Year	Percent
1950	10.11077
1955	9.8305
1960	9.91007
1965	8.84917
1970	10.61643
1975	10.71024
1980	10.91261
1985	10.84649
1990	11.1311
1995	11.95753
2000	12.76652
2005	12.52928
2010	11.72876
2015	10.72666
2020	10.41578
2025	10.89717
2030	11.27998
2035	10.43727
2040	9.69342
2045	9.21484
2050	8.94919
2055	8.68667
2060	8.35917
2065	7.97393
2070	7.56058
2075	7.20803
2080	6.91324
2085	6.6768
2090	6.45935
2095	6.24057
2100	6.05075