Year	Percent
1950	3.66041
1955	3.99548
1960	4.23472
1965	4.54715
1970	4.81716
1975	5.04523
1980	5.14322
1985	5.11338
1990	5.09129
1995	4.6855
2000	4.32078
2005	4.07929
2010	3.90132
2015	3.83761
2020	3.92672
2025	4.13186
2030	4.441
2035	4.80647
2040	5.30818
2045	5.889
2050	6.48501
2055	7.14458
2060	7.9184
2065	8.8432
2070	9.94396
2075	11.10298
2080	12.28305
2085	13.48807
2090	14.7411
2095	16.0369
2100	17.35746