Year	Percent
1950	6.57383
1955	6.0761
1960	5.92092
1965	5.76322
1970	5.62136
1975	5.44735
1980	5.21799
1985	4.98362
1990	5.04511
1995	4.7365
2000	4.45176
2005	4.18588
2010	3.96436
2015	3.97174
2020	3.97261
2025	3.96848
2030	4.00767
2035	4.19532
2040	4.5215
2045	4.97738
2050	5.56962
2055	6.30918
2060	7.18129
2065	8.16413
2070	9.22029
2075	10.34062
2080	11.50729
2085	12.70344
2090	13.91419
2095	15.11298
2100	16.30624