ODF three times more popular than OOXML
Try googling for "filetype:docx" (15,400 pages) and "filetype:odt" (45,000 pages).
Similarly "filetype:xlsx" gives 3340 pages and "filetype:ods" gives 9670 pages.
So ODF has about three times as many documents and spreadsheets as OOXML at present. Both are dwarfed by .doc (21,900,000 pages) and .xls (4,420,000 pages). As for the macro-enabled OOXML .docm and .xlsm there are less than 600 together.