Year	Percent
1950	9.89132
1955	9.28812
1960	8.83166
1965	10.22099
1970	11.09996
1975	13.05281
1980	12.79292
1985	12.75297
1990	11.93011
1995	12.22386
2000	13.39886
2005	10.98444
2010	8.51308
2015	7.35973
2020	8.65341
2025	10.4746
2030	9.42294
2035	8.31296
2040	7.48719
2045	7.0947
2050	7.10191
2055	7.28537
2060	7.36676
2065	7.08524
2070	6.59966
2075	6.24249
2080	6.11051
2085	6.12545
2090	6.15156
2095	6.07097
2100	5.8881