Year	Percent
1950	10.41469
1955	10.24134
1960	10.27479
1965	10.38637
1970	11.08355
1975	11.57002
1980	11.35046
1985	11.61178
1990	10.56534
1995	9.29658
2000	8.6149
2005	7.8589
2010	8.41128
2015	7.49943
2020	7.42445
2025	6.26959
2030	5.33734
2035	5.14173
2040	5.20651
2045	5.32415
2050	5.26785
2055	5.05183
2060	4.81088
2065	4.70219
2070	4.76763
2075	4.8945
2080	4.96056
2085	4.93645
2090	4.86807
2095	4.83841
2100	4.87755