https://en.wikipedia.org/wiki/Demographics_of_Russia
The population of Russia peaked at 148,689,000 in 1991, just before the breakup of the Soviet Union.
Low birth rates and abnormally high death rates caused Russia’s population to decline at a 0.5% annual rate, or about 750,000 to 800,000 people per year from the mid-1990s to the mid-2000s.
The UN warned in 2005 that Russia’s then population of about 143 million could fall by a third by 2050, if trends did not improve.
In 2018, the UN predicted that Russia’s population will fall to 132 million by 2050.
Pat Buchanan predicted this years ago.