Year	Percent
1950	8.61385
1955	8.82161
1960	9.77974
1965	10.09823
1970	11.23
1975	12.08742
1980	12.50843
1985	9.76038
1990	9.45503
1995	9.73027
2000	11.31465
2005	9.74822
2010	7.52421
2015	6.35339
2020	6.46956
2025	6.89496
2030	6.87718
2035	6.27925
2040	5.72577
2045	5.44018
2050	5.4706
2055	5.64246
2060	5.71419
2065	5.60286
2070	5.41696
2075	5.31061
2080	5.32909
2085	5.42032
2090	5.47557
2095	5.4417
2100	5.34874