Used stamps exchanges.

Postal rates are going up again in Canada on January 14th :(

From the 1st of January (in roubles):
2013 - 21.4 (train) /24.1 (avia) [from 1st October 2012]
2014 - 23 (train) /26 (avia)
2015 - 26.5 (train) /30 (avia)
2016 - 31 (train) /35 (avia)
2017 - 35 (train) /40 (avia)
2018 - 40 (train) /45 (avia)
2019 - 45 (train) /50 (avia)
2020 - 48 (train) /53 (avia)

In England it's happened in April

Подняли на 5 рублей с 1 января.

In Russia we have higher international postal rates since every 1st of January (in roubles):
2015 - 26.5 (train) /30 (avia)
2016 - 31 (train) /35 (avia)
2017 - 35 (train) /40 (avia)
2018 - 40 (train) /45 (avia)
2019 - ? :(