Year	Percent
1950	15.52063
1955	14.94988
1960	9.16584
1965	16.08164
1970	12.76523
1975	15.56897
1980	14.25302
1985	9.35374
1990	9.80103
1995	9.25303
2000	9.31599
2005	8.65861
2010	8.04041
2015	7.17245
2020	6.88846
2025	6.86135
2030	6.77707
2035	6.53826
2040	6.1919
2045	5.88539
2050	5.74666
2055	5.7593
2060	5.7648
2065	5.6733
2070	5.5021
2075	5.34454
2080	5.25663
2085	5.24323
2090	5.24493
2095	5.20766
2100	5.12874