Timeline for all types of items produced by
SPS [Japan]

Year	Items
1983	3
1985	6
1986	2
1987	1
1988	4
1989	2
1990	4
1991	3
1992	2
1993	2
1994	2
1995	2
1996	2
1997	1
1998	2
2001	1

39 items with a valid date were considered for this timeline (84.78% of the total)
7 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 7 items.