The improvement is surprising, given other official data show the economy to have contracted by 0.7 % over the same period. (news-to-use.com)
And they looked at official data on traffic injuries and hospital admissions to see if the scheme had any noticeable effects on personal safety. (sciencedaily.com)
However, using other official data as a proxy, including coal and electricity consumption, other analysts have tried to calculate a figure on its behalf. (carbonbrief.org)