1999 NHW10 Prius consumption screen

Consumption Screen downhill from Lake Yamanaka, return leg of commute. Can get 12 consecutive 5 min but only shows 6. NHW10 consumption only goes to 30km/L but instantaneous shows 40km/L, a little bit easier than later models. Would prefer real consumption, L/5min. NHW10 does not have trip mpg, so I usually keep track of tank by following gasoline tank(10 pips) or adding/subtracting consumption from baseline 20km/L.