I have a document with auto-numbering and would like to insert an asterisk before the number while retaining the auto-numbering. Can this be done?

Example Before:
1.1
1.1.1
1.1.2
1.1.3
1.1.4
2.1
2.1.1
2.1.2
2.1.3

Example After:
1.1
*1.1.1
*1.1.2
1.1.3
*1.1.4
*2.1
2.1.1
*2.1.2
*2.1.3