Year	Percent
1950	9.54406
1955	9.28483
1960	8.31559
1965	7.52702
1970	6.69084
1975	6.84067
1980	6.65463
1985	6.44862
1990	5.79052
1995	4.95598
2000	5.13764
2005	4.41397
2010	4.73743
2015	4.5384
2020	4.2463
2025	4.05524
2030	3.97268
2035	3.94902
2040	4.00757
2045	4.08753
2050	4.08925
2055	4.03306
2060	4.00801
2065	4.04308
2070	4.12223
2075	4.21408
2080	4.27394
2085	4.28022
2090	4.26441
2095	4.26555
2100	4.29639