Yes Basil77, but look a bit further -
File:Ethnic groups in Latvia.png - Wikipedia, the free encyclopedia
And you will see that number of ethnic Latvians was +/- constant all the time (but is slowly decreasing now).
Ethnic Russian population on the other hand decreased a lot faster.
And rapid increase of Russian population in Soviet times was because Moscow sent immigrants here - and their inflow stopped after USSR dissolution.
And as you can see a lot of them went back to USSR after that.


The same with Estonia - ethnic Estonian population did not change much - Russian population decreased there.
And the same with Lithuania.
In all Baltic states, after occupation ended, percentage of "main" ethnicity grew, but Russian population decreased.
And we view that as a good sign.


Latvian population decreased in 90s because it was a period of crisis and uncertainty and people chose to have less children.
Russia's population chart is similar:
http://en.wikipedia.org/wiki/File:Po..._of_Russia.PNG