Year	Percent
1950	8.81532
1955	7.3877
1960	6.98212
1965	7.17588
1970	7.23119
1975	6.72329
1980	5.86431
1985	5.65592
1990	6.45612
1995	6.72701
2000	5.21917
2005	5.43472
2010	5.91933
2015	6.0163
2020	6.13004
2025	6.05491
2030	5.76218
2035	5.53251
2040	5.55091
2045	5.66373
2050	5.72303
2055	5.69624
2060	5.59531
2065	5.4765
2070	5.41047
2075	5.40641
2080	5.41852
2085	5.39972
2090	5.33639
2095	5.24608
2100	5.16788