As I continue to come to terms with the fact that Wales won't be at the World Cup next year, for a dose of 'enjoy it while it lasts' I had a quick check at the current FIFA World Rankings to see them at #13 for now at least. But I also noticed that their highest (#8 in 10/2015) and lowest (#117 in 08/2011) moments in the FIFA Rankings almost came within 4 years of eachother, meaning some of the results being used at the lowest point were close to being factored into the calculation while the team was at their peak*, although in the rankings of 07/2015 Wales were #10 so the 'overlap' can still somewhat apply. And aside from that, moving 109 places in such a timeframe is noteworthy even if it's by the FIFA calculation and there was system gaming involved.
Combined with hearing someone mention that this time a decade ago Iceland were losing 3-0 to Liechtenstein (and looking at their ranking history they managed to go from #131 [06/2012] > #23 [07/2015] in just over 3 years), it got me wondering what the biggest turnarounds in ranking history are?
Can be an objective topic but these things usually end up as a more subjective discussion anyway once 'not quite the record but still impressive' stories of national team achievement (probably like the ones above) are shared, so talk about any ranking (FIFA, ConIFA, UEFA, Elo, RoonBa, etc.), any direction (up, down... guess that's it), any length, obviously the bigger the range in a short timeframe the better.
* = he wrote in October 2017 hoping this part turns out to be wrong
|Highest: 16 (June 2011)|
|Lowest: 199 (June 2007)|
Though that's cheating a bit, as a newly established team they of course started off with zero points.