There are two ways in which reliable bus services support local economies.
The countries who were graded and then ranked were those for which reliable data existed.
Mr. Blitzer said the decline in Phoenix outpaced any during the recession of the early 1990s, for which reliable figures are available.
In 2001, the most recent year for which reliable statistics exist, that amounted to 3.1 million unplanned pregnancies and 1.3 million abortions, representing 20percentt of all pregnancies.
In 2010 the most recent year for which reliable statistics exist the number of people under correctional control declined for the third year running.
The New York Times examined overall city spending as reported by the Independent Budget Office, including state and federal aid, dating back to 1980, the earliest year for which reliable records are available.
According to a recent C.D.C. report, some twelve and a half million Americans misused prescription opioids in 2015, the latest year for which reliable figures are available, and more than three-quarters of a million used heroin.
The hidden nature of the problem, political sensitivities and ethical considerations make it very difficult to implement national surveys on the basis of which reliable global data can be generated.
Until 1980, during any Presidential election for which reliable data exist and in which there had been a gender gap, the gap had run one way: more women than men voted for the Republican candidate.
The results were a steady income upon which reliable budgets could be based and an erosion in the power of the diets which, although never abolished, lost much of the influence they had held in the past.
We show results for 23 countries the five largest developed ones, the ten largest developing ones for which reliable data are available, and a selection of eight smaller ones where cronyism is thought to be a big problem.
