Taking 2020 as the reference year, what was the NNI of the United States in 2006? (2020 = 100, answer rounded to two decimal places)

```reference [{"type":"table-json","id":13}] ``` Summary: We first retrieved annual U.S. Net National Income data for 2000-2024 from the internal macro database . Using the 2020 value as the base (index = 100), we calculated the relative level for 2006, yielding 64.75 .