Year	Percent
1950	9.10577
1955	8.61888
1960	8.80174
1965	9.54008
1970	10.68378
1975	12.01888
1980	11.75128
1985	9.82364
1990	8.22313
1995	6.9816
2000	7.19637
2005	7.24952
2010	7.10458
2015	5.97781
2020	5.74184
2025	5.28165
2030	5.43767
2035	5.52867
2040	5.45822
2045	5.39081
2050	5.30228
2055	5.24935
2060	5.25112
2065	5.27419
2070	5.25163
2075	5.18044
2080	5.09765
2085	5.03869
2090	5.00237
2095	4.9844
2100	4.95765