No, they are US numbers. The chart illustrates the problem with statistics, which is that they can be interpreted in different ways.

Also, the second article has the same figures for the 35d as the first article, except for one month. I tend to trust the first figures, instead of believing a three-fold increase in a single month.

Your 9:1 example from the article is actually when considering only the 30i, not the 35i. It is so high because it refers to only the third quarter, when the 30i was out of production and the 35i was in production. Another way of saying it is that the 35d sold at 9 times the rate of an out-of-production model, a few of which remained on dealer lots.

Instead of focusing on the 30i plus 35i, I think it is actually worth considering all x5 models, with all engines, in which diesels are running at around 20% of X5 sales YTD (from the first chart, and estimating 2:1 for six cylinder petrol to eight cylinder petrol, the traditional BMW split for many years). Not bad for a new engine, but a long way from 9:1.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue