Year
|
pH
|
Upper error
|
Lower error
|
2001
|
8.084379
|
8.087379
|
8.081379
|
2002
|
8.084018
|
8.087018
|
8.081018
|
2003
|
8.082284
|
8.085284
|
8.079284
|
2004
|
8.080876
|
8.083876
|
8.077876
|
2005
|
8.078868
|
8.081868
|
8.075868
|
2006
|
8.077197
|
8.080197
|
8.074197
|
2007
|
8.075279
|
8.078279
|
8.072279
|
2008
|
8.073255
|
8.076255
|
8.070255
|
2009
|
8.072379
|
8.075379
|
8.069379
|
2010
|
8.070578
|
8.073578
|
8.067578
|
2011
|
8.068713
|
8.071713
|
8.065713
|
2012
|
8.0668
|
8.0698
|
8.0638
|
2013
|
8.064538
|
8.067538
|
8.061538
|
2014
|
8.063363
|
8.066363
|
8.060363
|
2015
|
8.061879
|
8.064879
|
8.058879
|
2016
|
8.059508
|
8.062508
|
8.056508
|