What was the change in the net sales from APAC between 2017 and 2018?
{"Net sales:       -- AMER ": {"2019": 1429308, "2018": 1218944, "2017": 1166346}, "Net sales:       -- APAC ": {"2019": 1557205, "2018": 1498010, "2017": 1279261}, "Net sales:       -- EMEA ": {"2019": 309933, "2018": 281489, "2017": 192829}, "Net sales:       -- Elimination of inter-segment sales ": {"2019": -132012, "2018": -124935, "2017": -110384}, "Net sales:       -- ": {"2019": 3164434, "2018": 2873508, "2017": 2528052}, "Operating income (loss): -- AMER": {"2019": 57780, "2018": 38637, "2017": 41924}, "Operating income (loss): -- APAC": {"2019": 208178, "2018": 213935, "2017": 200103}, "Operating income (loss): -- EMEA": {"2019": 4475, "2018": 1447, "2017": -6197}, "Operating income (loss): -- Corporate and other costs": {"2019": -128378, "2018": -135736, "2017": -105922}, "Operating income (loss): -- ": {"2019": 142055, "2018": 118283, "2017": 129908}, "Other income (expense): -- Interest expense": {"2019": -12853, "2018": -12226, "2017": -13578}, "Other income (expense): -- Interest income": {"2019": 1949, "2018": 4696, "2017": 5042}, "Other income (expense): -- Miscellaneous, net": {"2019": -5196, "2018": -3143, "2017": 451}, "Other income (expense): -- Income before income taxes": {"2019": 125955, "2018": 107610, "2017": 121823}}
net_sales_apac_2018 = df["Net sales:       -- APAC "]["2018"]
net_sales_apac_2017 = df["Net sales:       -- APAC "]["2017"]
answer = net_sales_apac_2018 - net_sales_apac_2017