Which time period saw a smaller increase of population, 1787 to 1860 or 1920 to 1930?
return populations ;return #1 in  1787 ;return #1 in  1860 ;return difference of #2 and  #3 ;return #1 in  1920 ;return #1 in  1930 ;return difference of #5 and  #6 ;return which is lowest of #4 and  #7
['select', 'filter', 'filter', 'arithmetic', 'filter', 'filter', 'arithmetic', 'comparison']