Year	Percent
1950	5.21572
1955	4.58054
1960	4.32859
1965	4.23797
1970	4.1906
1975	4.21696
1980	4.35642
1985	4.47307
1990	4.83718
1995	4.94639
2000	4.9868
2005	4.87859
2010	4.68214
2015	4.66483
2020	4.71766
2025	4.91511
2030	5.26844
2035	5.81347
2040	6.50937
2045	7.40037
2050	8.29615
2055	9.16308
2060	10.00363
2065	10.936
2070	12.11805
2075	13.49351
2080	14.79878
2085	16.03537
2090	17.25594
2095	18.506
2100	19.80642