Stena Line, Sweden's largest ferry operator, says passenger volume rose 4 per cent in the first half, while freight volume rose 18 per cent. Stena carried 7.28 million passengers, compared with 7.03 million in the first half of 1996. Passenger volume in the English Channel rose 4 per cent to 3.41 million passengers, compared with the period last year. Freight volumes rose 31 per cent to 259,000 units. The Channel increase was an effect of the Eurotunnel fire in November.