pre_text: The movement of contract liabilities is mainly caused by the timing difference of the satisfaction of a performance of obligation and the consideration received from customers. The Company recognized NT$3,815 million and NT$616 million, respectively, in revenues from the contract liabilities balance at the beginning of the period as performance obligations were satisfied for the years ended December 31, 2018 and 2019.
table: As of January 1,2018 As of December 31,2018 As of December 31,2019
table: NT$(In Thousands) NT$(In Thousands) NT$(In Thousands)
table: Sales of goods and services $3,951,414 $932,371 $1,470,195
table: Current $3,951,414 $932,371 $988,115
table: Noncurrent — — 482,080
table: Total $3,951,414 $932,371 $1,470,195
question: Analyse this data from a financial earnings document. What is the increase/ (decrease) in Sales of goods and services for January 1, 2018 to December 31, 2018?