Stats
constructor(startTime: Date, endTime: Date, minimumAltitudeInMetres: Double, maximumAltitudeInMetres: Double, minimumSpeedInMilesPerHour: Double, maximumSpeedInMilesPerHour: Double, distanceInMetres: Double, timeSkiedInMilliSeconds: Long, activeHours: Double, trackDurationInMilliSeconds: Long, trackCount: Int, verticalFeetCumulative: Double, daysCount: Int?, daysStats: Map<String, Stats>?)