Among the female legislators, what is the percentage of the senators in Maine?
female refers to gender_bio = 'F'; percentage = MULTIPLY(DIVIDE(SUM(type = 'sen'), COUNT(type)), 100.0); senators refers to type = 'sen'; Maine refers to state = 'ME';
SELECT CAST(SUM(CASE WHEN T2.type = 'sen' THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(T2.type) FROM current AS T1 INNER JOIN `current-terms` AS T2 ON T1.bioguide_id = T2.bioguide WHERE T2.state = 'ME' AND T1.gender_bio = 'F'
database name:db_id legislator
current table current Cols: ballotpedia id dtype text, bioguide id dtype text, birthday bio dtype date, cspan id dtype real, fec id dtype text, first name dtype text, gender bio dtype text, google entity id dtype text, govtrack id dtype integer, house history id dtype real, interuniversity consortium for political and social research id dtype real, last name dtype text, legislator id dtype text, maplight id dtype real, middle name dtype text, nickname dtype text, official full name dtype text, opensecrets id dtype text, religion bio dtype text, suffix name dtype text, thomas id dtype integer, votesmart id dtype real, wikidata id dtype text, wikipedia id dtype text, 
current-terms table current-terms Cols: address dtype text, bioguide id dtype text, caucus dtype text, chamber dtype text, class dtype real, contact_form dtype text, district dtype real, end dtype text, fax dtype text, last dtype text, name dtype text, office dtype text, party dtype text, party affiliations dtype text, phone dtype text, relation dtype text, Really Simple Syndication URL dtype text, start dtype text, state dtype text, state_rank dtype text, title dtype text, type dtype text, url dtype text, 
historical table historical Cols: ballotpedia id dtype text, bioguide id dtype text, bioguide previous id dtype text, birthday bio dtype text, cspan id dtype text, fec id dtype text, first name dtype text, gender bio dtype text, google entity id dtype text, govtrack id dtype integer, house history alternate id dtype text, house history id dtype real, interuniversity consortium for political and social research id dtype real, last name dtype text, legislator id dtype text, maplight id dtype text, middle name dtype text, nickname dtype text, official full name dtype text, opensecrets id dtype text, religion bio dtype text, suffix name dtype text, thomas id dtype text, votesmart id dtype text, wikidata id dtype text, wikipedia id dtype text, 
historical-terms table historical-terms Cols: address dtype text, bioguide id dtype text, chamber dtype text, class dtype real, contact_form dtype text, district dtype real, end dtype text, fax dtype text, last dtype text, middle dtype text, name dtype text, office dtype text, party dtype text, party affiliations dtype text, phone dtype text, relation dtype text, Really Simple Syndication URL dtype text, start dtype text, state dtype text, state_rank dtype text, title dtype text, type dtype text, url dtype text, 
social-media table social-media Cols: bioguide dtype text, facebook dtype text, facebook_id dtype real, govtrack dtype real, instagram dtype text, instagram_id dtype real, thomas dtype integer, twitter dtype text, twitter_id dtype real, youtube dtype text, youtube_id dtype text, 
