As a result of this calamity, the population of Ireland decreased by 25%, or 2 million people, in the 1840s
I walked past two 
Holocaust mass graves going to and from school; but ... May 20, 2013 at 12:25 
pm ..... 1.7 million people in Ireland and this was reduced to about .9 million... [DOC] [TLE] Irish Emigration - National Bureau of Economic Research [PAR] million people.