what is the total number of multi-platinum songs?
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col : year | date | title | format(s) | award description(s) | result(s) row 1 : 1987 | july 28 | whitney | album | gold | won row 2 : 1987 | july 28 | whitney | album | platinum | won row 3 : 1987 | july 28 | whitney | album | 2× multi-platinum | won row 4 : 1987 | july 28 | "i wanna dance with somebody (who loves me)" | single | gold | won row 5 : 1987 | august 4 | whitney | album | 3× multi-platinum | won row 6 : 1987 | september 30 | whitney | album | 4× multi-platinum | won row 7 : 1987 | november 20 | whitney | album | 5× multi-platinum | won row 8 : 1988 | april 18 | whitney | album | 6× multi-platinum | won row 9 : 1989 | february 13 | "i wanna dance with somebody (who loves me)" | single | platinum | won row 10 : 1993 | june 23 | whitney | album | 7× multi-platinum | won row 11 : 1994 | november 29 | whitney | album | 8× multi-platinum | won row 12 : 1995 | november 29 | whitney | album | 9× multi-platinum | won row 13 : 1995 | december 6 | "so emotional" | single | gold | won
what is the total number of multi-platinum songs?
Year Date Title Format(s) Award Description(s) Result(s)
1987 July 28 Whitney Album Gold Won
1987 July 28 Whitney Album Platinum Won
1987 July 28 Whitney Album 2× Multi-Platinum Won
1987 July 28 "I Wanna Dance with Somebody (Who Loves Me)" Single Gold Won
1987 August 4 Whitney Album 3× Multi-Platinum Won
1987 September 30 Whitney Album 4× Multi-Platinum Won
1987 November 20 Whitney Album 5× Multi-Platinum Won
1988 April 18 Whitney Album 6× Multi-Platinum Won
1989 February 13 "I Wanna Dance with Somebody (Who Loves Me)" Single Platinum Won
1993 June 23 Whitney Album 7× Multi-Platinum Won
1994 November 29 Whitney Album 8× Multi-Platinum Won
1995 November 29 Whitney Album 9× Multi-Platinum Won
1995 December 6 "So Emotional" Single Gold Won
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