NUMWITH	Number of individuals with the given set of characteristics who reported the target source of income.
AVGTARGT	Average income from the target source of income for those who reported it.
AVGINCWT	Average of all income for individuals who reported the target source of income (all income = employment earnings + u.i. benefits + self-employed earnings + investment income).
NUM_W_O	Number of individuals with the given set of characteristics who reported no income from the target source on income.
AVGINCWO	Average all income for individuals who reported no income from the target source of income.
TOTNUM	Total number of immigrants with the given set of characteristics (NUMWITH + NUM_W_O).
PCENT	Percent of individuals who reported receiving income from the target source of income (NUMWITH * 100 / TOTNUM)

Source: Statistical Tables on Inter-provincial Mobility from the IMDB Compendium, 1980-1995. Citizen and Immigration Canada.