Good mornig Inessa. You can find good and reliable statisticas in the official web page of OIV - International Organization of Vine and Wine : www.oiv.int . In this web page, there is a section called "Databases and statistics", with a lot of information about production-consumption of wines in the World.
http://www.oiv.int/public/medias/2256/en-communique-de-presse-octobre-2015.pdf (report) or at database: http://www.oiv.int/en/databases-and-statistics/database?bdd=IG