Thanks. I have edited the sentence in question to link to your comment.
Update: According to my original source, either I misheard him/her or he/she misspoke. 15 years is the correct number.
Thanks. I have edited the sentence in question to link to your comment.
Update: According to my original source, either I misheard him/her or he/she misspoke. 15 years is the correct number.