Year	Percent
1950	12.45822
1955	12.49092
1960	12.3489
1965	12.20061
1970	12.15796
1975	13.60872
1980	13.69782
1985	13.30606
1990	13.1942
1995	12.67115
2000	13.10222
2005	13.97301
2010	13.11649
2015	11.77787
2020	11.46311
2025	11.34069
2030	11.0785
2035	10.5797
2040	9.992
2045	9.46072
2050	9.04461
2055	8.70937
2060	8.38095
2065	8.02595
2070	7.6519
2075	7.3142
2080	7.01058
2085	6.75055
2090	6.50677
2095	6.2732
2100	6.05503