YoY difference on Year (Whole Number) field, Not Date field

Hi, I'm relatively new to DAX and have a challenge...I have a file with a Year column (no month, no day in any other column). I can't change the year to a date or all years turn to 1905. I want to do a YoY % change calculation. I've tried multiple versions of measures and no luck. Here's a sample of the data:

And here's the desired output:

Any guidance is appreciated. TIA!

Best,

Jeff