Year	Percent
1950	9.31311
1955	9.05745
1960	8.31356
1965	7.6309
1970	8.75744
1975	9.50903
1980	11.42277
1985	11.26167
1990	11.25498
1995	10.85121
2000	11.48566
2005	12.73561
2010	10.32354
2015	7.83631
2020	6.92593
2025	8.32587
2030	10.26072
2035	9.34148
2040	8.29812
2045	7.50709
2050	7.14285
2055	7.19944
2060	7.44347
2065	7.56383
2070	7.28339
2075	6.77355
2080	6.38951
2085	6.24513
2090	6.26599
2095	6.30975
2100	6.24396