Year	Percent
1950	7.44084
1955	7.05945
1960	8.21569
1965	8.85201
1970	8.2875
1975	6.659
1980	5.65698
1985	5.80437
1990	5.55215
1995	5.91246
2000	5.1603
2005	4.82365
2010	4.64849
2015	4.68983
2020	4.86719
2025	4.84655
2030	4.65697
2035	4.42838
2040	4.31365
2045	4.35374
2050	4.48689
2055	4.61463
2060	4.65002
2065	4.60558
2070	4.54661
2075	4.54619
2080	4.60185
2085	4.67297
2090	4.70157
2095	4.66901
2100	4.59866