Year	Percent
1950	11.34032
1955	12.8405
1960	13.55319
1965	14.29363
1970	14.25873
1975	10.42729
1980	11.06914
1985	8.96897
1990	8.47291
1995	8.0945
2000	7.934
2005	7.3282
2010	7.30244
2015	6.99772
2020	6.77542
2025	6.58547
2030	6.44
2035	6.33022
2040	6.26336
2045	6.22995
2050	6.20192
2055	6.15404
2060	6.09152
2065	6.00762
2070	5.93336
2075	5.85957
2080	5.79285
2085	5.7236
2090	5.65178
2095	5.58428
2100	5.52276