I'm guessing that since the chart was from 2003, it reflects TU 98. And it does match my experiences with all accounts reporting $0.
DI, the problem is that TU is the only formula that rewards 0% util at higher scores. I still got hit by EQ when all reported $0.
I noticed my score on CK decreased when no balance is reporting. Now that I'm letting a balance report the score increased. I mentioned that to CWCID before.