American snack manufacturer J & J Snack Food Corp has seen its annual income increase by 19%, due in no small part to the performance of pretzel sales. The latest figures from the company show an annual increase in income overall, with net income in the year ended Sept. 28 at $64,381,000, equal to $3.43 per share on the common stock, up 19% from $54,118,000, or $2.87 per share, in …