The assessed contributions for the top 5 member states are as follows:

The assessed contributions for the top 5 member states are as follows:

- United States: 22.00%

- China: 20.004%

- Japan: ~8.03% to 8.56% (historically the third-largest)

- Germany: ~6.09%

- United Kingdom: ~4.0% to 4.5%

Together, the financial assessments for the United States and China alone account for about 42% of the UN's entire regular budget.

If you'd like to explore how UN funding is allocated, I can:

- Detail how the UN determines individual scales of assessment.

- Compare these figures against voluntary contributions to specific UN agencies.

- Provide historical context on how these percentages have evolved.

Let me know if you would like to narrow down the list or explore a specific area of UN financing.