Ooh. I copied your data from your displayed message, pasted it into a word processing program (Pages), changed the font to Courier there, and it was easy to line up the columns using spaces. Then I just copied that data, pasted it into a new ASIF message, selected the data and changed it to Courier using the Font Face drop-down, and it displays fine:
Watts Capacity Global
per Capita Megawatts Rank
Denmark 944 5,412 14
Ireland 719 3,425 19
Sweden 688 6,820 11
Germany 680 55,876 3
Spain 499 23,120 5
Portugal 489 5,049 15
Uruguay 435 1,504 27
Finland 366 2,023 26
Canada 336 12,313 8
Austria 324 2,830 23
United Kingdom 300 19,836 6
US 270 87,544 2
Edit: of course, the easier way to do the last step is to choose Courier from the Font Face drop-down,
click between the “[f ont=courier][/f ont]” labels, and paste the data.