Year	Percent
1950	10.43642
1955	10.48311
1960	10.50548
1965	10.42919
1970	10.22866
1975	10.79154
1980	11.17136
1985	10.39555
1990	10.01207
1995	10.32698
2000	11.00998
2005	10.62042
2010	9.7026
2015	9.53245
2020	8.92815
2025	9.4814
2030	8.89956
2035	8.63863
2040	8.32443
2045	8.0587
2050	7.85504
2055	7.64153
2060	7.43416
2065	7.22031
2070	6.99001
2075	6.78034
2080	6.58112
2085	6.403
2090	6.2178
2095	6.03951
2100	5.87403