Fuel economy of my CityBug

I'm driving my Peugeot 107 over six months now and yesterday I had to refill my gastank again and after that I calculated that I scored a new best fuel economy.
I scored a fuel economy of 1 ltr/19,71 km or 5,07 ltr/100 km. The refill before that I also scored very well 1 ltr/19,65 km or 5,09 ltr/100 km. I can realy notice that the fuel economy is getting better after the cold winter months.

Untill now I drove 5.775 km in total and I had to refill my gastank 12 times.
My overall fuel economy score is 1 ltr/17,42 km or 5,74 ltr/100 km.