Year	Percent
1950	11.36308
1955	9.90908
1960	9.35185
1965	10.32202
1970	10.43765
1975	10.05917
1980	8.75976
1985	8.19326
1990	7.97146
1995	7.82698
2000	7.21636
2005	6.67288
2010	6.24937
2015	5.93878
2020	5.92351
2025	5.61547
2030	5.32586
2035	5.1341
2040	4.9966
2045	4.90562
2050	4.85753
2055	4.80411
2060	4.73482
2065	4.67297
2070	4.63848
2075	4.63627
2080	4.64704
2085	4.65177
2090	4.64579
2095	4.63056
2100	4.61589