Year	Percent
1950	5.03229
1955	4.78325
1960	4.9588
1965	5.05186
1970	5.20966
1975	5.35052
1980	5.46739
1985	5.56971
1990	6.14008
1995	6.46397
2000	6.89144
2005	7.26874
2010	7.8098
2015	8.91951
2020	10.08281
2025	11.28382
2030	12.50083
2035	13.84386
2040	15.34705
2045	17.17559
2050	19.0936
2055	20.95089
2060	22.78421
2065	24.56664
2070	26.17611
2075	27.34287
2080	28.47159
2085	29.54812
2090	30.57658
2095	31.4811
2100	32.23903