Year	Percent
1950	9.57207
1955	9.25906
1960	8.31538
1965	7.91856
1970	7.58446
1975	7.6555
1980	7.65397
1985	6.92066
1990	5.80013
1995	4.72668
2000	4.33269
2005	4.20209
2010	4.92031
2015	5.07347
2020	4.83468
2025	4.47617
2030	4.17752
2035	4.12477
2040	4.33087
2045	4.58971
2050	4.68553
2055	4.59984
2060	4.46847
2065	4.4356
2070	4.54453
2075	4.71529
2080	4.83089
2085	4.81295
2090	4.70408
2095	4.59845
2100	4.56677