Here is global sea ice extent's year-to-date average as of May 25th:
Sorry about the blurry picture. It's due to the way Google portrays figures & pictures on blogger. I haven't found a fix, and I doubt they care enough about blogger anymore to do something about this.
Global_sea_ice_extent(t) = Arctic_sea_ice_extent(t) + Antarctic_sea_ice_ extent(t)