# date (year)	 area (km^2)
    2013.822	       0.000
    2013.841	       0.004
    2013.885	      -0.061
    2013.904	      -0.015
    2013.910	       0.007
    2013.929	       0.071
    2013.953	       0.056
    2013.997	       0.228
    2014.016	       0.340
    2014.079	       0.483
    2014.085	       0.495
    2014.104	       0.358
    2014.255	       0.822
    2014.956	       0.494
    2015.044	       0.525
    2015.156	       1.042
    2015.200	      -0.000
    2015.638	       0.875
    2015.701	       1.733
    2015.707	       1.069
    2015.882	       1.503
    2015.989	       1.206
    2016.033	       1.232
    2016.776	       3.813
    2016.844	       2.839
    2016.863	       4.197
    2016.883	       4.435
    2016.995	       4.121
    2017.014	       4.815
    2017.195	       3.324
    2017.258	       2.472
    2017.301	       3.682
    2017.696	       2.361
    2017.847	       3.079
    2017.896	       3.118
    2017.959	       3.067
    2018.159	       3.412
    2018.748	       5.350
    2018.767	       5.091
    2018.773	       5.213
    2018.855	       5.311
    2018.942	       3.866
    2018.992	       3.009
    2019.030	       3.050
    2019.142	       4.575
    2019.712	       2.439
    2019.775	       2.894
    2019.781	       2.789
    2019.995	       3.513
    2020.063	       5.081
    2020.150	      -1.408
    2020.169	      -1.190
    2020.194	      -1.495
    2020.787	       2.127
    2020.831	       1.572
    2021.682	     -10.851
    2021.751	     -10.399
    2021.890	     -10.327
    2022.036	      -9.994
    2022.734	     -10.745
    2022.932	     -10.199
    2022.975	     -10.404
    2023.000	     -10.544
