Year	Percent
1950	9.40809
1955	10.10267
1960	9.19972
1965	9.67436
1970	8.94154
1975	8.94532
1980	8.03924
1985	7.93587
1990	7.02036
1995	5.59872
2000	5.22682
2005	5.11793
2010	5.0016
2015	5.4013
2020	4.77288
2025	4.22566
2030	3.9301
2035	3.93626
2040	4.06458
2045	4.21738
2050	4.26253
2055	4.17126
2060	4.07036
2065	4.0815
2070	4.21733
2075	4.39602
2080	4.52173
2085	4.54713
2090	4.49945
2095	4.4579
2100	4.47282