https://phys.org/news/2018-06-antarctica-ramps-sea.html

The assessment, led by Professor Andrew Shepherd at the University of Leeds and Dr. Erik Ivins at NASA's Jet Propulsion Laboratory in California, was supported by the European Space Agency (ESA) and the US National Aeronautics and Space Administration (NASA).

Their findings show that, prior to 2012, Antarctica lost ice at a steady rate of 76 billion tonnes per year—a 0.2 mm per year contribution to sea level rise. However, since then there has been a sharp, threefold increase. Between 2012 and 2017 the continent lost 219 billion tonnes of ice per year—a 0.6 mm per year sea level contribution.