Timeline for all types of items produced by
Yamaha

Year	Items
1983	3
1984	16
1985	13
1986	6
1987	1
1988	6
1989	1
1991	2
1992	6
1993	7
1994	13
1995	1
1996	2
1997	4
1998	2
2000	2

85 items with a valid date were considered for this timeline (86.73% of the total)
13 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 13 items.