Year	Percent
1950	11.74613
1955	11.39589
1960	11.03004
1965	13.13527
1970	13.16013
1975	13.34602
1980	13.04762
1985	13.04148
1990	13.26447
1995	13.24803
2000	12.64091
2005	11.10853
2010	8.4921
2015	7.4066
2020	8.91894
2025	10.11227
2030	9.02982
2035	7.91234
2040	6.97315
2045	6.50016
2050	6.4662
2055	6.59931
2060	6.58526
2065	6.25585
2070	5.80487
2075	5.50559
2080	5.41569
2085	5.44481
2090	5.45438
2095	5.36561
2100	5.20328