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This shows the population of Ireland in millions (second column) from 1780 to 1920 (first column where 0 corresponds to the year 1790). Data from "Mathematical Models in the Social, Management and Life Sciences" by D.N. Burghes and A.D. Wood, Ellis Horwood, 1980, page 104.

1st col	2nd col
0	4.0
10	4.6
20	5.2
30	5.9
40	6.7
50	7.6
60	8.2
70	6.9
80	5.8
90	5.4
100	5.2
110	4.7
120	4.5
130	4.4
140	4.4