| year | book title | author |
| 1971 | |
| 1972 | |
| 1973 | |
| 1974 | |
| 1975 | |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | |
| 1991 | |
| 1992 (adult) | |
| 1992 (childrens) | |
| 1993 (adult) | |
| 1993 (childrens) | |
| 1994 (adult) | |
| 1994 (childrens) | |
| 1995 (adult) | |
| 1995 (childrens) | |
| 1996 (adult) | |
| 1996 (childrens) | |
| | year | book title | author |
| 1997 (combined) | |
| 1998 (adult) | |
| 1998 (childrens) | |
| 1999 (adult) | |
| 1999 (childrens) | |
| 2000 (adult) | |
| 2000 (childrens) | |
| 2001 (adult) | |
| 2001 (childrens) | |
| 2002 (adult) | |
| 2002 (childrens) | |
| 2003 (adult) | |
| 2003 (childrens) | |
| 2004 (adult) | |
| 2004 (childrens) | |
| 2005 (adult) | |
| 2005 (childrens) | |
| 2006 (adult) | |
| 2006 (childrens) | |
| 2007 (adult) | |
| 2007 (childrens) | |
| 2008 (adult) | |
| 2008 (childrens) | |
| 2009 (adults) | |
| 2009 (childrens) | |
|