As do I. It's just that Oxford's example reads:
"the mid 17th century"
https://en.oxforddictionaries.com/definition/midWhich looks odd to me. The American Heritage Dictionary says:
"Usage Note: Many compounds other than those entered here are formed with mid-. In forming compounds, mid- is normally joined to the following word or element without a space or hyphen: midpoint. If the second element begins with a capital letter, it is separated with a hyphen: mid-May. It is always acceptable to separate the elements with a hyphen to prevent possible confusion with another form, as, for example, to distinguish mid-den (the middle of a den) from the word midden. Note that the adjective mid1 is a separate word, though, as is the case with any adjective, it may be joined to another word with a hyphen when used as a unit modifier: in the mid Pacific but a mid-Pacific island."
But it seems to clash with usage in newspapers. E.g.:
https://www.theguardian.com/us-news/2016/oct/27/us-coast-gua...http://sports.yahoo.com/news/us-coast-guard-suspends-search-...I think hyphens are a lost cause...