Timeline for all types of items produced by
Sony Corp. [Japan]

Year	Items
1983	15
1984	31
1985	36
1986	20
1987	8
1988	5
1989	7
1990	1
1991	3
1992	1
1994	1
1995	1
1998	2

131 items with a valid date were considered for this timeline (88.51% of the total)
17 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 17 items.