| Year | Volume | Number | Holdings | ||
|---|---|---|---|---|---|
| 2009 | 35 | 70 | Yes | ||
| 2009 | 35 | 69 | Yes | ||
| 2008 | 34 | 68 | Yes | ||
| 2008 | 34 | 67 | Yes | ||
| 2007 | 33 | 66 | Yes | ||
| 2007 | 33 | 65 | Yes | ||
| 2006 | 32 | 64 | Yes | ||
| 2006 | 32 | 63 | Yes | ||
| 2005 | 31 | 62 | Yes | ||
| 2005 | 31 | 61 | Yes | ||
| 2004 | 30 | 60 | Yes | ||
| 2004 | 30 | 59 | Yes | ||
| 2003 | 29 | 58 | Yes | ||
| 2003 | 29 | 57 | Yes | ||
| 2002 | 28 | 56 | Yes | ||
| 2002 | 28 | 55 | Yes | ||
| 2001 | 27 | 53 -54 | Yes | ||
| 2000 | 26 | 51 -52 | Yes | ||
| 1999 | 25 | 49 -50 | Yes | ||
| 1998 | 24 | 47 -48 | Yes | ||
| 1997 | 23 | 45 -46 | Yes | ||
| 1996 | 22 | 43 -44 | Yes | ||
| 1994-1995 | 20-21 | 39 -42 | Yes | ||
| 1975-1993 | 1-19 | 1 -38 | Yes |