Year	Percent
1950	9.28201
1955	9.98893
1960	11.21598
1965	10.26152
1970	9.07174
1975	8.09047
1980	8.81744
1985	9.32905
1990	8.47023
1995	7.67723
2000	6.7232
2005	5.30626
2010	4.82579
2015	5.20021
2020	5.23304
2025	5.1522
2030	4.95562
2035	4.64715
2040	4.40582
2045	4.41702
2050	4.59317
2055	4.72841
2060	4.74828
2065	4.68378
2070	4.6089
2075	4.61081
2080	4.70693
2085	4.81989
2090	4.87405
2095	4.83415
2100	4.75705