Year	Percent
1950	11.54923
1955	10.04967
1960	8.59043
1965	8.53517
1970	10.66881
1975	11.97064
1980	12.39683
1985	11.73036
1990	11.04516
1995	11.10544
2000	11.55353
2005	10.67359
2010	10.12205
2015	8.79941
2020	8.28429
2025	8.1182
2030	8.48648
2035	7.93747
2040	7.35729
2045	6.84264
2050	6.4788
2055	6.2676
2060	6.11986
2065	5.94157
2070	5.71472
2075	5.48771
2080	5.31343
2085	5.20967
2090	5.1533
2095	5.10443
2100	5.03192