| Year | Volume | Number | Holdings | ||
|---|---|---|---|---|---|
| 2005 | 57 | 228 | Yes | ||
| 2005 | 57 | 225 -227 | Yes | ||
| 2004 | 56 | 224 | Yes | ||
| 2004 | 56 | 223 | Yes | ||
| 2004 | 56 | 221 /222 | Yes | ||
| 2003 | 55 | 219 /220 | Yes | ||
| 2003 | 55 | 217 -218 | Yes | ||
| 2002 | 54 | 213 -216 | No | ||
| 2001 | 53 | 212 | Yes | ||
| 2001 | 53 | 211 | Yes | ||
| 2001 | 53 | 209 -210 | Yes | ||
| 2000 | 52 | 205 -208 | Yes | ||
| 1999 | 51 | 202 -204 | Yes | ||
| 1999 | 51 | 201 | Yes | ||
| 1998 | 50 | 197 -200 | Yes | ||
| 1997 | 49 | 193 -196 | Yes | ||
| 1996 | 48 | 189 -192 | Yes | ||
| 1995 | 47 | 185 -188 | Yes | ||
| 1994 | 46 | 181 -184 | Yes | ||
| 1993 | 45 | 177 -180 | Yes |