CNN Business’ Back-to-Normal Index, developed in partnership with Moody’s Analytics last year, shows the US economy is 90% of the way back to where it was before the pandemic began over a year ago. The index, which is comprised of 37 national and seven state-level indicators, had bottomed out at around 57% in April 2020.But despite the immense improvement, getting that last 10% back is going to be hard. The vaccination effort is ongoing and consumers are once again spending