Year	Percent
1950	7.09068
1955	7.06802
1960	7.8871
1965	9.41652
1970	9.55343
1975	9.88419
1980	10.20783
1985	9.52605
1990	8.84924
1995	7.60743
2000	7.44199
2005	7.6548
2010	7.6837
2015	7.26619
2020	6.50188
2025	6.7568
2030	6.44059
2035	6.31686
2040	6.20326
2045	6.04341
2050	5.86212
2055	5.7434
2060	5.68011
2065	5.6098
2070	5.52872
2075	5.43085
2080	5.33855
2085	5.27141
2090	5.22747
2095	5.18657
2100	5.14368