Google adjusted it's algorithms and will be upgrading the weight of the adjustments soon giving HTTPS enabled sites more of an edge when ranking. HTTPS and non-SHA1 certs are the go these days. If you don't want to fork out for a cert Cloudflare will help you out as well as giving you some other options.
Also not 100% is as bad as 0% due to the fact that you are letting a MITM attack from happening on the 1% of pages that you don't encrypt.
Google adjusted it's algorithms and will be upgrading the weight of the adjustments soon giving HTTPS enabled sites more of an edge when ranking. HTTPS and non-SHA1 certs are the go these days. If you don't want to fork out for a cert Cloudflare will help you out as well as giving you some other options.
Also not 100% is as bad as 0% due to the fact that you are letting a MITM attack from happening on the 1% of pages that you don't encrypt.