Year	Percent
1950	7.0412
1955	6.90114
1960	6.95282
1965	7.0525
1970	6.7306
1975	6.03721
1980	5.4015
1985	5.05211
1990	6.24586
1995	5.88496
2000	5.59127
2005	5.10741
2010	4.92777
2015	5.4619
2020	6.46429
2025	7.62339
2030	8.68799
2035	9.62444
2040	10.48066
2045	11.74263
2050	13.61403
2055	15.13364
2060	16.31525
2065	16.98273
2070	18.18394
2075	19.94635
2080	21.68188
2085	23.16523
2090	24.42026
2095	25.70194
2100	27.16182