How has the percentage of writing using each script changed since 1945? With script reform, increasing influx of loanwords, and stylistic choices, several factors affect how much certain parts of the Japanese script are used in writing. Modern Japanese is very different from how it looked in 1945, by any measure.
Taking this into the context of my question, what proportion of words used in writing are written in hiragana, katakana, and kanji? I've been unsuccessful in finding any information on this so far. Keeping in mind that this has nothing to do with whether we agree or disagree with the changes that have happened (after all, language is just communication whatever words you use), does there exist data for something like:
% Words by script in 1945: Hiragana: .% Katakana: .% Kanji: .% % Words by script in 2015: Hiragana: .% Katakana: .% Kanji: .%
Any sources of written language is fine, whether newspapers (the easiest to find), journals, handwritten letters, websites and so on.