Switzerland's national society the USKA has published a report on their annual delegates meeting which includes the 2018 license and membership figures
At the meeting on 23rd February 2019, the USKA announced that the regulator OFCOM had reported Switzerland had 4,877 Amateur Radio licenses, comprising 4,414 HAREC (HB9) and 463 Novice (HB3), at the end of 2018.
The USKA reports a slight decline in membership, year-end total was 3,070. 2018 saw 86 people join but 119 members did not renew.
USKA AGM Report - https://www.uska.ch/wp-content/uploads/2019/03/Protokoll-DV-2019.pdf