From 2017 through 2022 there was a large increase in the number of exposed refrigerators:

https://trends.shodan.io/search?query=http.favicon.hash:-853...

Over the past few years it has fluctuated but not the same continued growth as before. If you don't have a Shodan account you can see a chart on twitter:

https://x.com/shodanhq/status/2110526116679021055