Timeline for all types of items produced by
Shogakukan Production

Year	Items
1983	4
1984	1
1992	1
1993	3
1994	4
1995	4
1996	4
1997	7
1998	4
1999	1
2000	2
2001	1
2002	2
2003	3

41 items with a valid date were considered for this timeline (73.21% of the total)
15 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 4 items.
199?: 6 items.
201?: 5 items.