Year	Percent
1950	6.62865
1955	7.07742
1960	8.15061
1965	6.93348
1970	7.28998
1975	8.37038
1980	8.13664
1985	6.81416
1990	5.94716
1995	6.26443
2000	6.54135
2005	6.34728
2010	5.8112
2015	5.39657
2020	5.85858
2025	5.90676
2030	5.81496
2035	5.6451
2040	5.39317
2045	5.25872
2050	5.30178
2055	5.39573
2060	5.41403
2065	5.34392
2070	5.2331
2075	5.14997
2080	5.13155
2085	5.14495
2090	5.13905
2095	5.09085
2100	5.0144