Year	Number
1992	153.31814639410106
1993	153.44063118737625
1994	149.81316271665014
1995	140.99050651925737
1996	133.0733074211335
1997	122.6637646987697
1998	113.87363807900664
1999	106.2892561983471
2000	97.93022970151087
2001	127.12450441036358
2002	124.21921091445427
2003	120.33189655172414
2004	114.03361861954313
2005	108.5455441883397
2006	106.10337175614868
2007	103.85644693839797
2008	103.30510562295991
2009	102.69382351129997