Taking one month of the year and extrapolating data to suggest...

Taking one month of the year and extrapolating data to suggest that is a trend is a dangerous habit. Further, you made a statement based on Europe and US previously but now stated Only Germany.

As a very good example, to back up my statement. Siemens Gamesa had a very poor quarter for signed contracts this quarter, but were up year on year. The data depends on when contracts are signed, at what time of the month contracts are signed.

I would suggest taking year on year a better way, but further reverting consider each year for the past 10 years. That way you have a genuine indication.

But taking one month (only) and comparing to a year previously is a gamble to suggest a trend.

Also, in the second example you provided you then selectively choose two different months, 13 months apart, which also suggests cherry picking to use data to prove your point.

My suggestion, is data is in the eye of the reader. Your bias is clear, or potentially tainted.