Year	Percent
1950	9.7164
1955	8.46724
1960	6.59514
1965	9.08802
1970	10.53755
1975	10.3284
1980	7.79594
1985	6.8087
1990	7.48185
1995	8.31548
2000	8.70143
2005	7.59731
2010	6.55403
2015	5.28884
2020	4.70392
2025	5.33707
2030	5.16657
2035	4.78034
2040	4.42236
2045	4.20885
2050	4.1221
2055	4.25127
2060	4.42616
2065	4.46871
2070	4.39628
2075	4.34381
2080	4.36966
2085	4.49023
2090	4.64067
2095	4.72647
2100	4.72118