{
  "range_key(1750,1967)":
  {
    "0":"0 knots;[0.0,0.0,0.0] ms-1",
    "1":"1-3 knots;[0.51444,1.02888,1.54332] ms-1",
    "2":"4-6 knots;[2.05776,2.5722,3.08664] ms-1",
    "3":"7-9 knots;[3.60108,4.11552,4.62996] ms-1",
    "4":"10-12 knots;[5.1444,5.65884,6.17328] ms-1",
    "5":"13-15 knots;[6.68772,7.20216,7.7166] ms-1",
    "6":"16-18 knots;[8.23104,8.74548,9.25992] ms-1",
    "7":"19-21 knots;[9.77436,10.2888,10.8032] ms-1",
    "8":"22-24 knots;[11.3177,11.8321,12.3466] ms-1",
    "9":"over 24 knots;[12.3466,12.861,null] ms-1"
  },
  "range_key(1968,yyyy)":
  {
    "0":"0 knots;[0.0,0.0,0.0] ms-1",
    "1":"1-5 knots;[0.51444,1.54332,2.5722] ms-1",
    "2":"6-10 knots;[3.08664,4.11552,5.1444] ms-1",
    "3":"11-15 knots;[5.65884,6.68772,7.7166] ms-1",
    "4":"16-20 knots;[8.23104,9.25992,10.2888] ms-1",
    "5":"21-25 knots;[10.8032,11.8321,12.861] ms-1",
    "6":"26-30 knots;[13.3754,14.4043,15.4332] ms-1",
    "7":"31-35 knots;[15.9476,16.9765,18.0054] ms-1",
    "8":"36-40 knots;[18.5198,19.5487,20.5776] ms-1",
    "9":"over 40 knots;[21.092,22.1209,null] ms-1"
  }
}