pre_text: Sales and Marketing Sales and marketing expenses in 2019 decreased by $7.6 million, or 32%, as compared to 2018. This decrease was primarily due to a reduction in the global sales support and marketing headcount, including reductions that were part of our restructuring activities during 2019 (refer to Note 4 of the accompanying consolidated financial statements), contributing to net decreases of $4.8 million in personnel-related costs, and $1.0 million in allocated facilities and information technology costs as compared to 2018. Restructuring costs in 2019 decreased $0.4 million, as there were additional restructuring activities in 2018, including a headcount reduction of approximately 13% of our workforce and the closure of certain leased facilities. The remaining decrease during 2019 was primarily the result of lower marketing costs of $0.6 million, as we eliminated or shifted the timing of certain of our marketing activities.
table: Years Ended December 31, Change
table: 2019 2018 $ %
table: (dollars in thousands)
table: Sales and marketing $15,836 $23,425 $(7,589) (32)%
table: Percent of revenues, net 32% 40%
question: Analyse this data from a financial earnings document. What is the company's average sales and marketing expenses in 2018 and 2019?