One by one.

One, two, two, four.

One, three, two, three, six and three, nine.

14 gets four, 24 gets eight, 3412, 446.

15 is five, 2510, 3515, 4520, 5525

16 is six, 262, 368, 4624, 5630, 6636.

17 gets seven, 274, 3721, 4728, 5735, 6742, 7749.

18 gets 8, 286, 3824, 4832, 5840, 6848, 7856, 8864.

Nine out of nine, 298, 3927, 4936, 59415, 6954, 79613, 8972 and 9981.

The diagram is as follows:

multiplication table