Year	Percent
1950	12.26987
1955	12.40924
1960	12.33678
1965	12.78634
1970	13.55587
1975	14.62877
1980	12.16189
1985	11.07367
1990	9.89352
1995	8.83438
2000	8.08564
2005	8.72078
2010	7.69255
2015	7.3097
2020	6.12211
2025	5.16957
2030	4.93089
2035	4.93945
2040	5.00338
2045	4.91781
2050	4.70396
2055	4.47798
2060	4.37751
2065	4.43856
2070	4.55502
2075	4.61798
2080	4.6024
2085	4.54987
2090	4.53935
2095	4.5999
2100	4.68946