and three years later:

GDP Gross Domestic Product per capita in 2021 US dollars

$88,588.48 Ireland ( https://tradingeconomics.com/ireland/gdp-per-capita )
$58,780.33 Australia ( https://tradingeconomics.com/australia/gdp-per-capita )
$61,280.39 United States ( https://tradingeconomics.com/united-states/gdp-per-capita )
$46,209.11 United Kingdom ( https://tradingeconomics.com/united-kingdom/gdp-per-capita )

Over these 3 years:

Ireland has risen by 12.47%
Australia has risen by 3.27%
United States has risen by 12.36%
United Kingdom has risen by 7.50%

However, as these are based on US dollar values, the figures can be influenced by FX rates.

The GDP Per Capita in Australian dollars was:

2021: $80,306
2018: $73,769

That was a rise of 8.86% for the three years, compared to the 3.27% when looked at on USD terms.

This graph from worldbank.org compares the original 4 countries in their local currency.

and three years later:

GDP Gross Domestic Product per capita in 2021 US dollars:

• $88,588.48 Ireland (/ireland)
• $58,780.33 Australia (/australia)
• $61,280.39 United States (/united-states)
• $46,209.11 United Kingdom (/united-kingdom)

Over these 3 years:

Ireland has risen by 12.47%
Australia has risen by 3.27%
United States has risen by 12.36%
United Kingdom has risen by 7.50%

However, as these are based on US dollar values, the figures can be influenced by FX rates.

The GDP Per Capita in Australian dollars was:

2021: $80,306
2018: $73,769

That was a rise of 8.86% for the three years, compared to the 3.27% when looked at on USD terms.

This graph from worldbank.org compares the original 4 countries in their local currency, and shows:

Ireland has risen by 25.15%.
Australia has risen by 8.86%.
United States has risen by 10.32%.
United Kingdom has risen by 5.19%.