Year	Percent
1950	4.98672
1955	4.68269
1960	5.45908
1965	5.55437
1970	5.64398
1975	6.48801
1980	6.82579
1985	7.26405
1990	10.66481
1995	10.00421
2000	8.62127
2005	9.30949
2010	8.92448
2015	10.11679
2020	12.18628
2025	14.98356
2030	19.10512
2035	21.59693
2040	22.48833
2045	23.78424
2050	24.91555
2055	26.23289
2060	27.66209
2065	28.94627
2070	30.05564
2075	31.10722
2080	32.13754
2085	33.0888
2090	33.90219
2095	34.5323
2100	34.9989