Year	% of population
1984	59.3
1985	57.5
1986	56
1987	54.6
1988	52.3
1989	55.5
1990	55
1991	54.1
1992	52.9
1993	51.9
1994	50
1995	48.8
1996	47.6
1997	47.5
1998	47.8
1999	46.8
2000	46.1
2001	45.4
2002	44.5
2003	43.4
2004	42.1
2005	40.9
2006	40.2
2007	39.3
2008	38.7
2009	38
2010	36.8
2011	35.4
2012	34.7
2013	33.2
2014	32.7
2015	32.1
2016	31.9
2017	31.3
2018	30.4
2019	30.3
2020	30.4
2021	30
2022	29.4