The number you'd want to look at to measure the real impact is excess mortality. In Europe right now, the excess mortality number is around 227.000 excess deaths and that number will rise significantly during the second wave we're in. Last year it was 70.000 by the years end. That's a 300% increase of excess deaths (not total deaths).
https://www.euromomo.eu/graphs-and-maps/#
In the US, excess deaths is at 300.000 so far, that will also increase significantly before the year is over. That would be roughly 11% increase in absolute deaths (not quite the 20% you're looking for, which is a ridiculous request, but it may get there soon enough).
CDC reports 300,000 excess deaths in US so far this year
"A new report from the US Centers for Disease Control and Prevention (CDC) says nearly 300,000 more deaths than expected have occurred in the United States so far in 2020. Only two-thirds of these “excess deaths” are directly attributed to COVID-19, suggesting the real death toll of the pandemic is likely higher than the confirmed mortality numbers."
https://newatlas.com/health-wellbeing/cdc-300000-excess-deaths-usa-coronavirus-covid19/
This is WITH national lockdown measures, masks, sanitizing, social distancing and so on. You can imagine how it would have looked otherwise.
If you want to cherrypick a country, Peru had roughly 175.000 total deaths in 2019, they've had 34.879 Corona deaths so far in 2020. That's 20%.
https://data.worldbank.org/indicator/SP.DYN.CDRT.IN?locations=PE
https://www.worldometers.info/coronavirus/country/peru/