Year	Percent
1950	11.83832
1955	12.82001
1960	6.14529
1965	7.43879
1970	10.74888
1975	12.68217
1980	12.1919
1985	9.46853
1990	8.40722
1995	8.16469
2000	9.93075
2005	10.72547
2010	9.00798
2015	7.05382
2020	6.60494
2025	7.52428
2030	7.79648
2035	7.06313
2040	6.21413
2045	5.56048
2050	5.3188
2055	5.46485
2060	5.61901
2065	5.49726
2070	5.20388
2075	4.94651
2080	4.88927
2085	5.02157
2090	5.18965
2095	5.2479
2100	5.17226