Year	Percent
1950	8.65966
1955	8.52599
1960	8.97665
1965	8.97089
1970	8.95024
1975	9.67869
1980	10.65803
1985	11.09573
1990	11.47318
1995	11.96378
2000	12.1334
2005	11.81633
2010	10.9767
2015	10.15281
2020	10.51147
2025	11.08316
2030	10.64078
2035	9.85863
2040	9.28406
2045	8.90873
2050	8.6701
2055	8.45634
2060	8.19541
2065	7.86254
2070	7.50882
2075	7.2004
2080	6.95219
2085	6.74537
2090	6.53724
2095	6.33293
2100	6.13633