Timeline for all types of items produced by
Bubble Bus Soft.

Year	Items
1983	2
1984	8
1985	18
1986	12
1987	9
1988	2

51 items with a valid date were considered for this timeline (96.23% of the total)
2 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 2 items.