Timeline for all types of items produced by
Philips Corp.

Year	Items
1975	6
1976	1
1977	4
1978	10
1979	8
1980	27
1981	15
1982	20
1983	33
1984	25
1985	3
1986	14
1987	2
1991	1

169 items with a valid date were considered for this timeline (88.95% of the total)
21 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 21 items.