Table:
text: Whitney Houston (album)
Recording Industry Association of America (RIAA) Awards
Recording Industry Association of America (RIAA) Awards
Year_ Date_ Title Formats Award_Descriptions Results
1985 June 24 Whitney Houston Album Gold Won
1985 August 26 Whitney Houston Album Platinum Won
1985 November 1 Whitney Houston Album 2× Multi-Platinum Won
1986 February 14 Whitney Houston Album 3× Multi-Platinum Won
1986 March 24 Whitney Houston Album 4× Multi-Platinum Won
1986 May 1 Whitney Houston Album 5× Multi-Platinum Won
1986 June 12 Whitney Houston Album 6× Multi-Platinum Won
1986 September 18 Whitney Houston Album 7× Multi-Platinum Won
1987 February 24 Whitney Houston Album 8× Multi-Platinum Won
1988 October 6 Whitney Houston Album 9× Multi-Platinum Won
1994 January 25 Whitney Houston Album 10× Multi-Platinum Won

Question: What is the average year with date February 24th for Whitney Houston (album)?