In the calendar year 2017, 47 Test matches were played. 40 had results and 7 were drawn. Coincidentally, in 2016 there were also 47 Tests if which 7 were drawn.
These were the ICC rankings at the end of the year:
India clearly at the top, although there is some chance that South Africa will close the gap in the current series. But even a 3-0 win is not likely to put SA at the top.
At the bottom end, note that West Indies and Bangladesh are now level and Zimbabwe is far behind. It will be interesting to see where Ireland and Afghanistan will be (say) five years from now. While Ireland seems to be declining, Afghanistan may well get ahead of Zimbabwe.
Now we look at the win-loss ratio for all Tests in 2017. This is not expected to give the same results as the ICC rankings since the latter cover a longer period.
While India clearly leads, New Zealand has also done well to be in second place. Zimbabwe is the only one without a win, though Pakistan and Bangladesh have the same number of wins.
More detailed analysis of individual performances will follow.