Year	Percent
1950	13.48785
1955	9.00452
1960	7.557
1965	11.61413
1970	13.21033
1975	13.40626
1980	12.80912
1985	12.26586
1990	11.88688
1995	12.92757
2000	14.06945
2005	12.86125
2010	11.69684
2015	10.04971
2020	10.70934
2025	11.38055
2030	10.93705
2035	10.0742
2040	9.26563
2045	8.93912
2050	8.93985
2055	8.84217
2060	8.43211
2065	7.89096
2070	7.45712
2075	7.2194
2080	7.05829
2085	6.84708
2090	6.53495
2095	6.22488
2100	5.9826