Year	Percent
1950	10.33365
1955	6.60075
1960	7.00786
1965	8.3691
1970	7.81569
1975	7.13612
1980	6.15856
1985	6.52724
1990	6.66275
1995	6.88035
2000	6.45031
2005	5.27681
2010	4.21498
2015	3.93524
2020	4.89346
2025	5.10317
2030	5
2035	4.72621
2040	4.42257
2045	4.32461
2050	4.543
2055	4.85743
2060	5.00157
2065	4.9398
2070	4.81634
2075	4.7744
2080	4.86859
2085	5.02811
2090	5.11567
2095	5.07553
2100	4.95926