content_image/1033817.jpg content_image/1033815.jpg
The following table shows a reconciliation of the beginning and ending balances for assets valued using significant unobservable inputs for the years ended December 31, 2020 and 2019: 

<img src='content_image/1033817.jpg'>

<img src='content_image/1033815.jpg'>

The fair value of the postretirement assets at December 31, 2020 and 2019, are as follows: 

