Year	Percent
1950	9.5373
1955	8.51466
1960	7.33011
1965	6.93385
1970	10.28067
1975	10.27148
1980	10.52339
1985	9.55227
1990	9.08669
1995	9.08773
2000	8.54667
2005	8.71404
2010	9.0068
2015	8.55315
2020	7.66041
2025	6.7374
2030	6.8659
2035	6.5516
2040	6.15472
2045	5.78027
2050	5.48085
2055	5.28433
2060	5.22671
2065	5.22666
2070	5.16813
2075	5.07215
2080	4.97599
2085	4.92521
2090	4.9196
2095	4.93884
2100	4.93148