Import of butter to Russian Federation from Europe stopped after 2014 due to trade sanctions.

1. UN Comtrade Database
2. Carson Sievert, Chris Parmer, Toby Hocking, Scott Chamberlain, Karthik Ram, Marianne Corvellec and Pedro Despouy (2016). plotly: Create Interactive Web Graphics via 'plotly.js'. R package version 4.5.6. https://CRAN.R-project.org/package=plotly
   
3. Carson Sievert. plotly for R. URL: https://cpsievert.github.io/plotly_book/