F5 published The 2017 TLS Telemetry Report, the second in a series aimed to reveal the cryptographic health of the Internet. The transition from SSL 3.0 to TLS 1.2 has been steady, with 27% more hosts making the move in 2017. The HTTP Strict Transport Security (HSTS) header, important because it instructs the browser to always use a secure connection, is finally seeing some forward motion. Self-signed certificates (those not signed by a trusted Certificate Authority) dropped from 15.2% in the first quarter of 2017 to 11.6% in 2018.”]
Source: https://informationsecuritybuzz.com/news/f5-releases-new-tls-report/