German footwear manufacturer Birkenstock raised expectations for the remaining year after reporting strong quarterly financial results on Thursday. Birkenstock said that sales should climb by about 20% on a currency-adjusted basis during the company’s financial year, which ends in October. The company had previously targeted sales growth of 17 to 18%. Birkenstock chief executive Oliver Reichert said the company continues to have great opportunities to expand sales of its existing products. He contended that sales of Birkenstock products – including the company’s iconic scandals – are only mini…