The Ministry Statistics report for those in ministry in 2016 was published in September 2017.
Using these latest figures available from the Church of England the following table shows the percentage of female incumbents (or incumbent-level posts) by diocese for 2016.
Click the link for the figures: diocesan tables 2016: % of female incumbents
The average percentage is 24.7% for the year and sadly 17 dioceses fail to reach that level with large dioceses Chichester, Blackburn, Winchester and London performing particularly poorly.
Top of the league are Truro and Liverpool with Ely as number one with 40 percent female.
The full report from the Church of England can be read here: 2016ministrystatistics