rrdtool graph:

The statistics were last updated: (MSK/MSD)
The statistics were last extracted: (MSK/MSD)

Daily Graph (5 Minute Average)

_5min.png" alt="day">
Weekly Graph (30 Minute Average)

_30min.png" alt="week">
Monthly Graph (2 Hour Average)

_2h.png" alt="month">
Yearly Graph (1 Day Average)

_1d.png" alt="year">