Year	Percent
1950	12.28254
1955	12.73697
1960	12.63082
1965	11.35569
1970	11.80793
1975	12.05613
1980	13.84287
1985	14.24194
1990	13.22382
1995	12.44708
2000	11.80331
2005	11.38467
2010	11.19375
2015	10.8428
2020	10.76681
2025	10.70146
2030	9.94038
2035	9.24027
2040	8.7013
2045	8.33169
2050	8.05621
2055	7.74005
2060	7.35608
2065	6.94222
2070	6.60347
2075	6.338
2080	6.13666
2085	5.94617
2090	5.74639
2095	5.5516
2100	5.39359