This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning). 
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.
Q: Passage: According to the Stockholm International Peace Research Institute, between 2005-2009 and 2010-2014, Russian exports of major weapons increased by 37 percent; Russia spent $66.4 billion on arms in 2015, then $69.2 billion in 2016, having taken 3rd place (after the U.S. and China).  According to the Russian Defence Ministry, share of modern weapons in the Armed Forces reached from 26 to 48 percent among different kinds of troops in December 2014. This was raised to 30.5–70.7% as of July 2015. The average was 58 per cent over the first half of 2017.
A: 
Did the share of modern weapons in the Armed Forces increase or decrease between 2014 and 2015?