Timeline for all types of items produced by
Oxygen

Year	Items
1990	1
1996	1
1997	1
1998	1
1999	1
2001	1
2002	1
2003	1

8 items with a valid date were considered for this timeline (53.33% of the total)
7 items with an invalid date.

Help us in our quest to find exact dates for:

199?: 5 items.
19??: 2 items.