Year	Percent
1950	10.89879
1955	9.09444
1960	8.66874
1965	8.66727
1970	8.31207
1975	7.94807
1980	7.53807
1985	7.94697
1990	7.7205
1995	8.18716
2000	8.34652
2005	6.44443
2010	4.89654
2015	5.34779
2020	6.48078
2025	5.99588
2030	5.96095
2035	5.64024
2040	5.16827
2045	5.02088
2050	5.25476
2055	5.5043
2060	5.53852
2065	5.39415
2070	5.20888
2075	5.10985
2080	5.16641
2085	5.29589
2090	5.359
2095	5.29516
2100	5.16094