FINANCIAL DATA BALANCE SHEET 2011 (Greek only) BALANCE SHEET 2012 (Greek only) BALANCE SHEET 2013 (Greek only) BALANCE SHEET 2014 BALANCE SHEET 2015 BALANCE SHEET 2016 BALANCE SHEET 2017 BALANCE SHEET 2018 BALANCE SHEET 2019 BALANCE SHEET 2020 BALANCE SHEET 2021 NSRF (Greek only)