Retail sales of motorhomes built by Monaco, Thor and Winnebago were up sharply during the first half of this year, according to Statistical Surveys Inc., an independent market research firm.

Meanwhile, retail sales of motorhomes built by Fleetwood and Coachmen were down more than 10%, Statistical Surveys reported.

Monaco’s motorhome retail sales increased 20.8% during the first half of this year to 2,901 units. Monaco ranks No. 4 in terms of retail sales volume among motorhome builders.

Thor, the No. 5 motorhome producer, saw its retail sales increase 14.2% during the first half of this year to 2,760 units.

Winnebago, the No. 2 motorhome builder, experienced a 10.5% increase in retail sales volume during the first half of this year to 5,257 units.

However, industry leader Fleetwood saw its motorhome retail sales decline 12.3% during the first half of this year to 6,805 units.

Coachmen, the No. 3 motorhome producer, saw its retail sales volume decline 13% during the first half of this year to 3,586 units.