MOSCOW, Dec 22 (Reuters) - Annual consumer inflation in Russia rose to 8.22% as of Dec. 20 from 8.11% a week earlier, Economy Ministry data showed on Wednesday. Russia"s central bank raised its key interest rate by 100 basis points to 8.5% on Friday and said more than one rate increase was still possible in coming months as inflation was near a six-year high. read more Reporting by Darya Korsunskaya; writing by Vladimir Soldatkin; Editing by Toby Chopra