2012 set a historic record low for measured sea-ice extent in the northern hemisphere. In southern hemisphere, 2022 set a similar record low. (We've been measuring since 1979).
2023 is on track to break both records. In the charts above, the bright red line is the 2012 (or 2022) data, and the bright blue (short) line is 2023 data thus far. First chart is for the northern hemisphere, second chart is the southern hemisphere.
For reference, the dark grey line is the 1981-2010 mean sea-ice extent, the slightly lighter grey band is the middle 50% of that same range, and the lightest grey band is the middle 80% of that same range.
You can see, year by year, the ice melt.
Note that the earth's albedo, the amount of aggregate insolation reflected back into space, is dependent at least partly on sea-ice extent. The warmer it gets, the more ice we lose, which results in deceasing amounts of energy being reflected back into space... which melts more sea-ice.