Reading data via AJAX call or MYSQL DB

Context: I am creating a website where I will need to show statistics. The statistics are calculated in Python and I need a place to store the calculated stats so it can be read and be presented in the website. The statistics are calculated by going through around 70000 JSON files so the calculations are done beforehand. The data is not dynamic so all I need to do is just read the data and therefore there is no writing or changing the data.

Solutions:

MySQL approach: I put the statistics in the DB beforehand and use PHP to connect to the MYSQL database and use SELECT statements to get the data and present it.

AJAX (JavaScript) approach: I put the statistics I need into a JSON file and put the file into my server. I use an AJAX call to get the JSON data and parse it and show the statistics from JavaScript.

Question: Which would be the best approach to take?