Year	Percent
1950	4.8189
1955	4.78301
1960	4.91638
1965	5.06304
1970	5.12043
1975	5.00304
1980	4.60741
1985	4.21791
1990	4.59309
1995	4.28643
2000	4.55617
2005	4.28173
2010	4.42685
2015	5.29169
2020	5.71234
2025	6.43172
2030	7.68059
2035	9.55562
2040	12.51763
2045	16.14661
2050	20.00894
2055	22.767
2060	24.56223
2065	26.2621
2070	28.11247
2075	30.58496
2080	32.91407
2085	34.61512
2090	35.66157
2095	36.37751
2100	37.06551