Timeline for all types of items produced by
NDUG

Year	Items
1985	3
1988	1
1989	2
1990	2
1991	2
1992	6
1993	8
1994	6
1995	6
1996	6
1997	6
1998	6
1999	6
2000	3

63 items with a valid date were considered for this timeline (95.45% of the total)
3 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 3 items.