Year	Percent
1950	9.99086
1955	8.63207
1960	7.65157
1965	8.681
1970	11.08573
1975	11.40657
1980	11.26452
1985	10.32603
1990	10.47674
1995	10.47816
2000	10.038
2005	9.47858
2010	9.62237
2015	9.21138
2020	7.90222
2025	6.04503
2030	5.93149
2035	5.78161
2040	6.24081
2045	6.2193
2050	5.59757
2055	4.92206
2060	4.613
2065	4.71668
2070	4.98591
2075	5.13036
2080	4.9967
2085	4.74067
2090	4.58225
2095	4.62336
2100	4.76861