You can click this link. just change ‘fi’ to your language code
https://www.lingq.com/api/v2/fi/progress/?interval=all_time
edit: sorry that is the wrong link.
Get the real stats here
https://www.lingq.com/api/v2/fi/progress/stats/?period=all
If you want to see how many coins you earned each month
https://www.lingq.com/api/v2/fi/progress/chart_data/?metric=earned_coins&period=all