m   average         100             -1            2
#&gt;  5:      5   rnorm   average         100             -1            3
#&gt;  6:      6   rnorm   average         100             -1            3
#&gt;  7:      7   rnorm   average         100             -1            4
#&gt;  8:      8   rnorm   average         100             -1            4
#&gt;  9:      9   rnorm   average         100             -1            5
#&gt; 10:     10   rnorm   average         100             -1            5
#&gt; 11: 