Figures given by Robert W. Thurston in his book "Life and terror in Stalin's Russia 1934-1941", 1996, Yale University Press, New York:
Arrests for CounterRevolutionary crimes (CR) by year and executions (these include ALL crimes, i. e., CR and "normal")
1930 - 266,679 - 20,201
1931 - 343,734 - 10,651
1932 - 195,540 - 2,728
1933 - 283,029 - 2,154
1934 - 90,417 - 2,056
1935 - 108,935 - 1,229
1936 - 91,127 - 1,118
1937 - 779,056 - 353,074
1938 - 593,326 - 328,618
1939 - 63,889 - 2,552
1940 - 71,806 - 1,649
1941 - 75,411 - 8,001
Two things must be taken into account:
1.- The number of actual convictions (sentences) is ALWAYS lower than that of arrests (I have given you only CR arrests). Then the number of executions is also much lower than even the number of convictions. The figures come like this in the book: ARREST ("normal", THEN CR) - CONVICTION (CR PLUS "normal") - EXECUTION (CR PLUS "normal").
2.- The worst years (this is the height of the terror, or "purges") are 1937 and 1938 (total 681,692 executions). For the rest of the years, the figures are very moderated for a country like the USSR. And they are real, for the sources are, for instance, a report prepared for Stalin's successors in 1953 (like Khruschev, who was to "denounce" Stalin's "crimes"). These are the famous "closed" KGB archives that were to reveal all the soviets' horror.
The book I have used is worth your attention and money.
Another interesting fact is this one:
Percentage of inmates sentenced for CR activity:
1934 - 26.5 %
1935 - 16.3 %
1936 - 12.6 %
1937 - 12.8 %
The rest are criminals, not counterrevolutionaries.
The author also makes a calculation for the number of people targeted for repression in 1937 (the height of the purges) in several oblasts (regions and in some cases entire Republics), comparing their total population and the number of people executed and exiled, the results are:
Executed
Moscow 0.41 %
Leningrad 0.059 %
Belorussia 0.038 %
Kirghiziia 0.018 %
Uzbekistan 0.012 %
Kazakhstan 0.049 %
Western Siberia 0.076 %
Exiled
Moscow 0.25 %
Leningrad 0.15 %
Belorussia 0.19 %
Kirghiziia 0.037 %
Uzbekistan 0.06 %
Kazakhstan 0.098 %
Western Siberia 0.18 %
You see it was very rare to even know somebody who was actually harassed or arrested by the NKVD. In another book I read that few people, among DEFECTORS living outside the USSR, could actually say the name of some person that had been actually "purged", from their families or acquaintances.
It is clear that there was a thin range of people targeted, and these were usually ancient exploiters, provocateurs and wreckers, most likely high-placed people, not the common folk. The "regime" DID NOT TERRORISE ITS PEOPLE.
What do you think of all this?