Time (years),dh (m),dh uncertainty (m) 2011.23,0.00,0.06 2011.40,-0.47,0.08 2011.56,-1.15,0.10 2011.72,-1.53,0.12 2011.89,-1.43,0.13 2012.05,-1.08,0.14 2012.22,-0.73,0.15 2012.38,-0.90,0.16 2012.55,-1.80,0.17 2012.71,-2.29,0.18 2012.87,-2.01,0.18 2013.04,-1.88,0.19 2013.20,-1.81,0.20 2013.37,-1.92,0.20 2013.53,-2.54,0.21 2013.70,-2.72,0.21 2013.86,-2.10,0.22 2014.02,-1.91,0.22 2014.19,-1.95,0.23 2014.35,-2.10,0.23 2014.52,-2.81,0.24 2014.68,-3.07,0.24 2014.85,-2.84,0.25 2015.01,-2.65,0.25 2015.17,-2.41,0.25 2015.34,-2.45,0.26 2015.50,-3.21,0.26 2015.67,-3.37,0.26 2015.83,-3.11,0.27 2016.00,-3.06,0.27 2016.16,-3.06,0.28 2016.32,-3.18,0.28 2016.49,-3.84,0.28 2016.65,-4.38,0.29 2016.82,-4.00,0.29 2016.98,-3.71,0.29 2017.15,-3.59,0.30 2017.31,-3.61,0.30 2017.47,-4.08,0.30 2017.64,-4.44,0.31 2017.80,-4.13,0.31 2017.97,-3.67,0.31 2018.13,-3.41,0.32 2018.30,-3.47,0.32 2018.46,-4.09,0.32 2018.62,-4.59,0.33 2018.79,-4.34,0.33 2018.95,-4.04,0.34 2019.12,-3.80,0.34 2019.28,-3.97,0.35 2019.45,-4.72,0.35 2019.61,-5.53,0.36 2019.77,-5.47,0.36 2019.94,-5.24,0.36 2020.10,-5.07,0.37 2020.27,-5.02,0.37 2020.43,-5.37,0.38 2020.60,-6.12,0.38