As has been said, it likely needs to be pre-1900. In that context, A huge percentage of Canada's immigration during the 1800's emigrated was balanced out by emigration, much of it to the US. In fact, it was only after 1900 that the net migration of Canada became positive. Population growth in this era was down more to natural increase.
Decade | Population at end of decade | Natural Increase | Immigration | Emigration | Net Migration |
1861-1871 | 2,630,000 | 563,000 | 186,000 | 376,000 | -190,000 |
1871-1881 | 3,164,000 | 619,000 | 353,000 | 438,000 | -85,000 |
1881-1891 | 3,628,000 | 669,000 | 903,000 | 1,108,000 | -205,000 |
1891-1901 | 4,101,000 | 654,000 | 326,000 | 507,000 | -181,000 |
1901-1911 | 5,528,000 | 711,000 | 1,782,000 | 1,066,000 | 716,000 |
1911-1921 | 6,677,000 | 916,000 | 1,592,000 | 1,360,000 | 232,000 |
1921-1931 | 8,169,000 | 1,389,000 | | | 103,000 |
( New Estimates of Gross National Product, Canada, 1870-1926: Some Implications for Canadian Development M. C. Urquhart)
Reduce or eliminate this tendency, probably through diverting investment that historically went from Britain to the US into Canada, and you will have gone a long way to increasing Canada's population