Timeline for all types of items produced by
Triad

Year	Items
1983	3
1984	3
1985	2
1986	69
1987	175
1988	113
1989	41
1990	43
1991	58
1992	37
1993	27
1994	17
1995	5
1996	10
1997	7
1998	2
1999	2
2000	5
2001	9
2002	7
2003	8
2004	4
2005	8
2006	5
2007	5
2008	2
2009	1
2013	1
2014	1
2015	1
2016	2

673 items with a valid date were considered for this timeline (91.44% of the total)
63 items with an invalid date.

Help us in our quest to find exact dates for:

199?: 23 items.
19??: 40 items.