Year	Percent
1950	10.68173
1955	11.41721
1960	6.6044
1965	6.72789
1970	9.9881
1975	11.79445
1980	11.67575
1985	10.34046
1990	9.83769
1995	9.94631
2000	10.78511
2005	11.80483
2010	11.33427
2015	9.0012
2020	7.61576
2025	9.01764
2030	10.7992
2035	9.83652
2040	8.74987
2045	8.00036
2050	7.85636
2055	7.96745
2060	7.94473
2065	7.67598
2070	7.24209
2075	6.83674
2080	6.58731
2085	6.46904
2090	6.37163
2095	6.22221
2100	6.0223