The gross domestic product of mainland Norway, which excludes the largely petroleum-based offshore sector, grew by 0.3 percent in the third quarter of 2018. Services in general, like technical and business services as well as the IT sector, saw pronounced growth. The construction sector has likewise continued to contribute to growth. Meanwhile, the drought in the summer caused a pronounced decrease in agricultural output, which lowered mainland growth by 0.2 percentage points. Also, weak growth in consumption, especially in September, impacted the wholesale and retail trade negatively and slowed growth in the third quarter. Leading Economic Index in Norway averaged 0.55 percent from 2016 until 2018, reaching an all time high of 1 percent in November of 2017 and a record low of -0.40 percent in July of 2016.