# date (year)	 area (km^2)
    2013.822	       0.000
    2013.904	       0.144
    2013.910	       0.315
    2013.929	       0.131
    2013.948	       0.091
    2013.953	       0.042
    2013.997	       0.072
    2014.016	       0.177
    2014.079	       0.208
    2014.104	       0.273
    2014.216	      -0.077
    2014.255	      -0.053
    2014.260	      -0.036
    2014.655	       0.529
    2014.674	       0.568
    2014.718	       0.421
    2014.737	       0.403
    2014.742	       0.393
    2014.893	       0.264
    2015.025	       0.409
    2015.044	       0.333
    2015.088	       0.362
    2015.156	       0.510
    2015.682	       0.236
    2015.701	       0.205
    2015.707	       0.291
    2015.877	       0.227
    2015.882	       0.260
    2015.989	       0.424
    2016.033	       0.483
    2016.057	       0.502
    2016.145	       0.273
    2016.183	       0.176
    2016.295	       0.421
    2016.645	       0.343
    2016.776	       0.291
    2016.863	       0.372
    2016.883	       0.411
    2016.932	       0.374
    2016.975	       0.369
    2016.995	       0.149
    2017.014	       0.113
    2017.038	       0.161
    2017.101	       0.031
    2017.170	       0.012
    2017.258	      -0.113
    2017.759	       0.167
    2017.784	       0.160
    2017.803	      -0.121
    2017.959	      -0.052
    2017.984	      -0.245
    2018.090	      -0.132
    2018.134	       0.184
    2018.153	      -0.021
    2018.159	      -0.015
    2018.197	      -0.035
    2018.203	      -0.028
    2018.660	       0.027
    2018.729	      -0.257
    2018.748	      -0.155
    2018.773	      -0.226
    2018.855	       0.004
    2018.967	       0.134
    2018.986	       0.618
    2019.030	       0.345
    2019.142	       0.437
    2019.186	       0.508
    2019.205	       0.562
    2019.249	       0.263
    2019.255	       0.163
    2019.293	       0.315
    2019.668	      -0.024
    2019.781	      -0.081
    2019.844	       0.145
    2019.907	      -0.257
    2019.932	      -0.219
    2019.951	      -0.294
    2019.956	      -0.506
    2019.975	      -0.345
    2020.000	      -0.328
    2020.044	      -0.256
    2020.126	      -0.151
    2020.150	      -0.182
    2020.169	      -0.188
    2020.281	      -0.209
    2020.675	      -0.162
    2020.781	      -0.172
    2020.787	      -0.134
    2020.918	      -0.149
    2020.956	      -0.104
    2020.962	      -0.088
    2020.981	      -0.097
    2021.025	      -0.204
    2021.068	      -0.361
    2021.219	      -0.445
    2021.288	      -0.304
    2021.701	      -0.274
    2021.707	      -0.241
    2021.751	      -0.014
    2021.789	       0.006
    2021.877	       0.075
    2021.890	      -0.019
    2022.036	       0.204
    2022.099	       0.632
    2022.121	       0.336
    2022.164	      -0.092
    2022.233	       0.003
    2022.734	       0.411
    2022.737	       0.464
    2022.822	       0.446
    2022.825	       0.450
    2022.932	       0.393
    2022.934	       0.362
    2023.060	       0.178
    2023.126	       0.213
    2023.148	       0.297
    2023.214	       0.059
    2023.236	       0.436
