Population Density of Canadian Provinces per square km.

PEI        24.8
NS         17.3
ON        14.0
NB        10.5
PQ          5.8
Alta       5.7
BC         4.8
Man      2.2
Sask      1.7
Nfld      1.4

A sampling:

Alberta would have to increase its population to 16,400,000 to equal PEI's density or to 11,450,000 to
equal Nova Scotia's.
Saskatchewan would have to grow to  16,000,000 to equal PEI's density, 11,280,000 to equal Nova Scotia's, or to 6,840,000 to equal New Brunswick's.
Even big population Ontario would have get to 22,760,000 to equal PEI's density or to 15,875,000 to get to where Nova Scotia is.

Lots of room for everybody Western Canada. Do you have good jobs for them? Are you sure you want the density of PEI or NS?