    Sentence 1: Forty to 50 years ago , the ratio was|  3 to 1, Kessler said, and 10 years ago , it was 2}  tot.    Sentence 2: Forty to 50 years ago, the ratio was  about 3-to-1 , Kessler said , and 10 years ago , it}  was about 2-to-1.