Year	Percent
1950	6.30423
1955	5.72915
1960	5.18695
1965	4.81069
1970	4.85188
1975	4.98528
1980	5.01525
1985	5.05632
1990	5.37688
1995	5.49721
2000	5.7675
2005	6.13302
2010	7.33041
2015	8.12309
2020	9.16352
2025	10.28968
2030	11.48034
2035	12.57759
2040	13.71498
2045	14.85782
2050	16.16683
2055	17.81007
2060	19.33623
2065	20.66392
2070	22.03764
2075	23.42454
2080	24.79414
2085	26.11759
2090	27.39481
2095	28.62467
2100	29.78374