Year	Percent
1950	11.7079
1955	15.85568
1960	17.90704
1965	18.18594
1970	16.3148
1975	15.73894
1980	15.55144
1985	15.29427
1990	15.75631
1995	14.21575
2000	10.8422
2005	10.56061
2010	10.53672
2015	12.19643
2020	10.96078
2025	9.5844
2030	8.56018
2035	8.18689
2040	8.20773
2045	8.11729
2050	7.71304
2055	7.14336
2060	6.69422
2065	6.47733
2070	6.40765
2075	6.3412
2080	6.17785
2085	5.94174
2090	5.72687
2095	5.60139
2100	5.56216