A Client has included Option X1 in Professional Services Contract and we are due to negotiate our first anniversary increase in rate. The chosen Index is has published these figures for the last year or so...
2015 Nov 151.8
2015 Dec 166.2
2016 Jan 154.2
2016 Feb 159.9
2016 Mar 177.2
2016 Apr 164.9
2016 May 153.6
2016 Jun 156.1
2016 Jul 159.1
2016 Aug 152.9
2016 Sep 150.5
2016 Oct 150.5
2016 Nov 151.3
2016 Dec 157.0
2017 Jan 154.2
The Anniversary of the award is in mid-January and, presumably, my Base Index is, therefore, 154.2. If this is the case, is my Last published Index 157.0 (i.e. 12 months January to December) or 154.2 (i.e. January to January)?
2015 Nov 151.8
2015 Dec 166.2
2016 Jan 154.2
2016 Feb 159.9
2016 Mar 177.2
2016 Apr 164.9
2016 May 153.6
2016 Jun 156.1
2016 Jul 159.1
2016 Aug 152.9
2016 Sep 150.5
2016 Oct 150.5
2016 Nov 151.3
2016 Dec 157.0
2017 Jan 154.2
The Anniversary of the award is in mid-January and, presumably, my Base Index is, therefore, 154.2. If this is the case, is my Last published Index 157.0 (i.e. 12 months January to December) or 154.2 (i.e. January to January)?