Year	Percent
1950	9.11364
1955	7.16257
1960	6.34794
1965	6.9701
1970	7.42521
1975	8.21976
1980	7.90333
1985	5.61278
1990	5.07908
1995	5.5566
2000	5.75467
2005	5.14555
2010	4.90087
2015	4.52034
2020	4.30221
2025	4.39149
2030	4.56853
2035	4.66258
2040	4.57376
2045	4.41867
2050	4.33226
2055	4.36488
2060	4.49951
2065	4.6331
2070	4.6834
2075	4.64814
2080	4.58715
2085	4.55335
2090	4.57548
2095	4.61417
2100	4.63924