# Years Size Links
HP 1991โ€“1992 23.9%
IAA 1993โ€“1996 60.1%
IRM 1993โ€“1996 20.9%
IU 1993โ€“1996 19.0%
NF 1989โ€“1992 19.6%
PDPA 1981โ€“1990 100.0%