The H-mode standard shot of ASDEX Upgrade provides an overviewof the long term evolution of machine conditions and scatter ofH-mode power threshold and confinement. This type-I ELMy H-mode isrun every day of plasma operation since 1999.After a long opening for in-vessel work,the power threshold drops rapidly by about 50% over100 discharges and then much slower by about 20% over the remaining 1000plasma dischargesmade in a campaign.At the natural density without gas puffing, confinement increases by about30%over about 500 discharges. Afterwards thepeak-to-peak scatter is about 20%, smaller athigh density.Conditioning causes changes of edge density and temperature,similar to the confinement degradation observed with gas puffing.