Discussion
The sum of ranks of Germany across the given duration is:
Answer: C
The ranks of Germany add up to 24.
Rank each year by share, counting tied countries at the same rank and skipping the next rank, as the key does:
\[ \begin{aligned} 2007 &: \text{share } 6,\ \text{rank } 7 \\ 2008 &: \text{share } 6,\ \text{rank } 6 \\ 2009 &: \text{share } 7,\ \text{rank } 5 \\ 2010 &: \text{share } 11,\ \text{rank } 3 \\ 2011 &: \text{share } 10,\ \text{rank } 3 \end{aligned} \]
In 2007 six countries are above Germany (USA 15, Sweden 11, France 9, and UK, Canada and Greece at 8), so Germany is 7th. In 2008 five are above it (13, 10, 9, 8, 8) and Sweden ties with it at 6. In 2009 four are above (13, 11, 9, 8), and in 2010 and 2011 only the USA and France are above. The sum is 7 + 6 + 5 + 3 + 3 = 24. Ranking without skipping after ties would give 21, which is not offered.
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