"time_start","time_end","fleet","obs"
1986,1987,1,23.666195
1987,1988,1,21.908791
1988,1989,1,20.095226
1989,1990,1,21.129742
1990,1991,1,19.752931
1991,1992,1,16.159851
1992,1993,1,12.76602
1993,1994,1,13.458271
1994,1995,1,16.119801
1995,1996,1,19.730362
1996,1997,1,22.1621379
1997,1998,1,21.6602639
1998,1999,1,19.572373
1999,2000,1,18.249558
2000,2001,1,13.9407460836
2001,2002,1,16.6805836329
2002,2003,1,19.8258663331
2003,2004,1,24.8653793126
2004,2005,1,27.7138884436
2005,2006,1,25.5430613354
2006,2007,1,25.8980003167
2007,2008,1,28.9770611839
2008,2009,1,24.3761511627
2009,2010,1,18.844149354
2010,2011,1,19.5206502588
2011,2012,1,20.3695900673
2012,2013,1,24.4086083996
2013,2014,1,23.7587808634
2014,2015,1,25.3278830962
1986,1987,2,286
1987,1988,2,235
1988,1989,2,182
1989,1990,2,210
1990,1991,2,206
1991,1992,2,184
1992,1993,2,188
1993,1994,2,268
1994,1995,2,289
1995,1996,2,410
1996,1997,2,520
1997,1998,2,440
1998,1999,2,451
1999,2000,2,428
2000,2001,2,203
2001,2002,2,239
2002,2003,2,469
2003,2004,2,598
2004,2005,2,563
2005,2006,2,591
2006,2007,2,568
2007,2008,2,611
2008,2009,2,466
2009,2010,2,350
2010,2011,2,298
2011,2012,2,417
2012,2013,2,599
2013,2014,2,649
2014,2015,2,683
1997.75,1997.75,3,1.53
1998.75,1998.75,3,2.01
1999.75,1999.75,3,1.25
2000.75,2000.75,3,0.94
2001.75,2001.75,3,2.34
2002.75,2002.75,3,2.46
2003.75,2003.75,3,2.27
2004.75,2004.75,3,3.44
2005.75,2005.75,3,2.77
2006.75,2006.75,3,3.17
2007.75,2007.75,3,3.45
2008.75,2008.75,3,3.18
2009.75,2009.75,3,2.6
2010.75,2010.75,3,1.85
2011.75,2011.75,3,3.42
2012.75,2012.75,3,4.47
2013.75,2013.75,3,3.95
2014.75,2014.75,3,2.16