I can't determine the family income range for each of those categories.

>I guess you are referring to Canada because that simply is not so in the U.S. The facts show otherwise.
>
>http://www.cbpp.org/4-13-05tax.htm
>http://www.factcheck.org/article280.html
>
>Share of federal tax burden:
>
>

>Lowest 20%   1.1%
>Second 20%   5.2%
>Middle 20%  10.5%
>Fourth 20%  19.5%
>Top 20%     63.5%
>Top 5%      35.9%
>Top 1%      20.1%
>

>
>While there are many references which claim different amounts, the percentage difference each one sites is very close.