19400
U.K. (United Kingdom) 1996:
19400
U.K. (United Kingdom) 1997:
16600
U.K. (United Kingdom) 1998:
tba
U.K. (United Kingdom) 1999:
13800
U.K. (United Kingdom) 2000:
11600
U.K. (United Kingdom) 2001:
12900
U.K. (United Kingdom) 2002:
11800
U.K. (United Kingdom) 2003:
12800
U.K. (United Kingdom) 2004:
11300
U.K. (United Kingdom) 2005:
10400
U.K. (United Kingdom) 2006: