Year	Percent
1950	9.61356
1955	8.74542
1960	8.30956
1965	8.30253
1970	8.44867
1975	8.50631
1980	8.7226
1985	8.18279
1990	8.4405
1995	7.87117
2000	6.83095
2005	5.64717
2010	5.38022
2015	5.27086
2020	5.16057
2025	4.93916
2030	4.53163
2035	4.06435
2040	3.87293
2045	3.98129
2050	4.15009
2055	4.25994
2060	4.26137
2065	4.19066
2070	4.13541
2075	4.18931
2080	4.3196
2085	4.45155
2090	4.51213
2095	4.50432
2100	4.46564