# date (year)	 area (km^2)
    2013.822	       0.000
    2013.910	      -0.012
    2013.934	       0.079
    2013.953	       0.112
    2014.110	      -0.012
    2014.197	      -0.091
    2014.260	      -0.068
    2014.285	      -0.082
    2014.655	       0.032
    2014.742	      -0.018
    2014.786	      -0.082
    2014.830	      -0.077
    2014.874	       0.005
    2014.986	       0.076
    2015.005	       0.103
    2015.118	      -0.007
    2015.249	      -0.154
    2015.268	      -0.095
    2015.312	      -0.167
    2015.644	       0.201
    2015.663	       0.264
    2015.688	       0.260
    2015.707	       0.274
    2015.838	       0.282
    2015.926	       0.374
    2016.014	       0.333
    2016.057	       0.240
    2016.213	       0.168
    2016.257	       0.124
    2016.276	       0.138
    2016.669	       0.202
    2016.869	       0.313
    2016.975	       0.270
    2017.000	       0.231
    2017.132	       0.060
    2017.307	       0.027
    2017.633	       0.150
    2017.658	       0.094
    2017.701	       0.151
    2017.721	       0.152
    2017.745	       0.043
    2017.852	       0.011
    2017.921	       0.108
    2018.159	      -0.074
    2018.797	       0.225
    2018.816	       0.189
    2018.904	       0.017
    2019.060	       0.022
    2019.148	      -0.109
    2019.192	      -0.035
    2019.674	       0.134
    2019.849	       0.063
    2019.868	       0.090
    2019.912	       0.023
    2019.956	       0.150
    2020.287	      -0.061
    2020.306	      -0.022
    2020.724	      -0.020
    2020.743	       0.024
    2020.831	       0.012
    2020.918	      -0.033
    2021.030	      -0.042
    2021.074	      -0.059
    2021.093	      -0.060
    2021.225	      -0.107
    2021.249	      -0.259
    2021.268	      -0.159
    2021.707	      -0.188
    2021.882	      -0.068
    2021.926	      -0.058
    2021.970	      -0.039
    2021.973	      -0.192
    2021.992	      -0.090
    2022.167	      -0.100
    2022.233	      -0.130
    2022.279	      -0.052
    2022.301	      -0.035
    2022.652	       0.001
    2022.671	       0.049
    2022.762	       0.028
    2022.825	       0.044
    2022.827	       0.061
    2022.934	      -0.019
    2022.981	       0.103
    2023.003	       0.122
    2023.200	      -0.021
