Year	Percent
1950	9.05822
1955	9.2427
1960	9.28166
1965	9.60469
1970	9.73875
1975	9.07767
1980	9.55641
1985	9.73358
1990	8.78809
1995	8.76583
2000	8.85342
2005	8.3969
2010	7.90022
2015	7.55331
2020	7.22676
2025	6.98885
2030	6.75237
2035	6.49587
2040	6.21887
2045	5.9688
2050	5.7729
2055	5.61842
2060	5.48106
2065	5.35657
2070	5.24488
2075	5.14812
2080	5.07014
2085	5.02132
2090	4.983
2095	4.94045
2100	4.90825