You do realize that the column in the chart titled "Tariffs Charged to the U.S.A. Including Currency Manipulation and Trade Barriers" is in fact just the ratio between the trade deficit and imports from each country?
For example,
U.S. exports to China were $143.5 billion and imports were $438.9 billion in 2024. (438.9 - 143.5)/438.9 = 67%.
Second example:
U.S. exports to the European Union were $370.2 billion and imports were $605.8 billion in 2024. (605.8 - 370.2)/605.8 = 39%.
If the ratio between the trade deficit and imports is less than 10% (even when there is a trade surplus), the ratio is graciously rounded up to 10%. This is the case with the UK, Colombia, Turkey and Singapore.
That is how they obtained all those numbers in that column. It is only based on U.S. exports and imports and has nothing to do with tariffs imposed on the U.S. by other countries, which are generally much lower than 10%.
I personally cannot wait for you to rediscover why isolationism is such a bad idea. It famously worked very well for the Soviet Union, not to mention North Korea. Have fun sewing your own clothes, I guess.