Year	Percent
1950	4.84524
1955	4.39079
1960	4.42423
1965	4.48682
1970	4.97163
1975	5.45017
1980	5.01222
1985	4.70574
1990	4.54796
1995	4.21697
2000	4.05618
2005	4.10938
2010	4.10828
2015	4.37453
2020	4.47272
2025	4.60808
2030	4.82432
2035	5.26678
2040	5.80343
2045	6.59875
2050	7.47525
2055	8.35725
2060	9.13787
2065	9.90658
2070	10.84625
2075	11.91704
2080	12.95219
2085	13.94532
2090	14.89371
2095	15.86216
2100	16.90021