Year	Percent
1950	9.08212
1955	8.76401
1960	9.34189
1965	9.37507
1970	9.46076
1975	9.50654
1980	9.82627
1985	10.23399
1990	11.7679
1995	9.33839
2000	8.62963
2005	8.50669
2010	8.61271
2015	7.94876
2020	7.39629
2025	6.97395
2030	6.99666
2035	6.81525
2040	6.61223
2045	6.42357
2050	6.22053
2055	6.01358
2060	5.8548
2065	5.75657
2070	5.6766
2075	5.59245
2080	5.49301
2085	5.40407
2090	5.33591
2095	5.28574
2100	5.24585