2018 effectively tied with 2008 and 2010 for the sixth lowest summertime minimum extent in the satellite record.
https://nsidc.org/arcticseaicenews/
"Overall, the amount of multiyear ice remaining at the end of summer is considerably lower than it used to be during
the 1980s and 1990s. Now multiyear ice covers 2 million square kilometers (772,000 square miles) or less of the
Arctic Ocean. The oldest ice, which has survived at least four melt seasons, used to cover nearly 1.5 million square
kilometers (579,000 square miles). In 2018, this old ice covered only 94,000 square kilometers (36,0000 square miles)
at the September minimum."