Year	Percent
1950	5.28632
1955	5.21511
1960	5.18059
1965	5.19232
1970	5.22093
1975	5.31059
1980	5.47785
1985	5.66681
1990	6.67943
1995	7.11476
2000	7.68075
2005	8.38889
2010	9.2078
2015	10.22525
2020	11.57671
2025	13.19229
2030	14.97314
2035	16.85803
2040	18.62273
2045	20.23651
2050	21.73693
2055	23.10365
2060	24.4909
2065	25.78531
2070	27.1088
2075	28.5115
2080	29.80634
2085	31.01978
2090	32.15972
2095	33.21146
2100	34.15252