Hist of MU

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## 1/1 1/2 1/3 1/4 1/5 1/6 1/7 1/8 1/9 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1 
## 107 110 101  94  96  89 108  88  91  99  97  99  99 106 108 111  85

Donation distribution for different benefit/cost ratio