Year	Percent
1950	7.85543
1955	7.73258
1960	8.3894
1965	9.48525
1970	9.5119
1975	9.02612
1980	9.60953
1985	8.87329
1990	9.84219
1995	9.79224
2000	9.07099
2005	7.14497
2010	5.96685
2015	5.74678
2020	6.43008
2025	7.09237
2030	6.85715
2035	6.12118
2040	5.48682
2045	5.2635
2050	5.44844
2055	5.74576
2060	5.85806
2065	5.70775
2070	5.44096
2075	5.25847
2080	5.2425
2085	5.31665
2090	5.37352
2095	5.33279
2100	5.21226