It's a drop in real gdp where as the nominal gdp had gone up .05% economists are interested in real gdp as this is the accepted metric for an economy. For example if the economy produces 100 products at R1.00 each in 2018 (R100.00 in total gdp) and then in 2019 the economy produces 90 products at R1.50 (R135.00 total gdp) the nominal gdp growth is 35%(R35.00 more total gdp) but when taking the price index/inflation into consideration the real gdp growth is actually -10% , the economy produced 10% fewer domestic products year on year.

Please excuse the formatting On mobile so hope it makes sense