Year	Percent
1950	8.82008
1955	7.89641
1960	7.31442
1965	7.31722
1970	7.37547
1975	7.15327
1980	6.50112
1985	6.36857
1990	7.42496
1995	7.22074
2000	7.53619
2005	6.87845
2010	6.84545
2015	7.73079
2020	9.23092
2025	10.87939
2030	12.17554
2035	13.3855
2040	14.68967
2045	16.06584
2050	18.00996
2055	19.79337
2060	20.33709
2065	20.87059
2070	21.58076
2075	23.60625
2080	25.32783
2085	26.56741
2090	27.42351
2095	28.21763
2100	29.16691