Year	Percent
1950	10.56399
1955	11.91
1960	12.55516
1965	12.90652
1970	13.26669
1975	13.41897
1980	12.72029
1985	11.7765
1990	11.63298
1995	11.53662
2000	11.06672
2005	9.36465
2010	7.78989
2015	7.01377
2020	7.18259
2025	8.20271
2030	7.73649
2035	6.98464
2040	6.22656
2045	5.78171
2050	5.76421
2055	5.9227
2060	5.94821
2065	5.74045
2070	5.42354
2075	5.20345
2080	5.15728
2085	5.21157
2090	5.24298
2095	5.1826
2100	5.05218