Year	Size
1993	33.0
1994	35.1
1995	37.2
1996	38.6
1997	39.3
1998	40.5
1999	44.8
2000	44.6
2001	44.0
2002	44.0
2003	44.0
2004	45.6
2005	48.1
2006	48.8
2007	47.5
2008	46.8
2009	46.2
2010	46.0
2013	46.5