Year	Percent
1950	12.03757
1955	11.54836
1960	10.77932
1965	11.39521
1970	13.36934
1975	12.51165
1980	11.31713
1985	10.5613
1990	8.99095
1995	8.20972
2000	6.16366
2005	6.71688
2010	6.11821
2015	4.74415
2020	4.30038
2025	4.1429
2030	4.16645
2035	4.19584
2040	4.26258
2045	4.12311
2050	3.8208
2055	3.70376
2060	3.80541
2065	4.00436
2070	4.20485
2075	4.32216
2080	4.28987
2085	4.17149
2090	4.12594
2095	4.20359
2100	4.33101