Year	Percent
1950	11.47318
1955	12.05553
1960	13.79985
1965	12.33675
1970	11.20323
1975	11.18821
1980	9.93349
1985	9.16571
1990	9.11351
1995	8.62982
2000	7.9207
2005	6.71958
2010	6.1148
2015	5.54751
2020	5.68575
2025	5.66579
2030	5.49743
2035	5.2123
2040	4.93945
2045	4.81359
2050	4.84628
2055	4.93958
2060	4.9769
2065	4.91253
2070	4.81305
2075	4.75904
2080	4.78552
2085	4.85767
2090	4.89703
2095	4.88459
2100	4.82223