他上半年的數據應該沒有年化(annualise), i.e. if you earn GDP per capita of $1 in 1H2019 and GDP per capita of $1 in 2H2019, your 2019 GDP per capita would be $2 (excl. seasonality, population change, inflation, etc.)
I would never die for my beliefs because I might be wrong. --Bertrand Russell