Timeline for all types of items produced by
Xtal Soft. [Japan]

Year	Items
1983	6
1984	11
1985	8
1986	6
1987	8
1988	4
1989	3
1990	4

50 items with a valid date were considered for this timeline (71.43% of the total)
20 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 20 items.