DIAGNOSTIC PRODUCTS <DPCZ> SEES EARNINGS GROWTH Diagnostic Products Corp president and chief executive officer Sigi Ziering said he expects to maintain the same compound average annal net income growth in 1987 as the company has for the past five years. "We expect the same performance in net income over the next five years as we have had in the past," Ziering said. Over the past five years Ziering said the company has had average compound net income growth of 32 pct annually with a 27 pct per year growth in earnings per share. For 1986 the company had net income of 6.3 mln dlrs, or 1.07 dlrs per share, vs 3.9 mln dlrs, or 73 cts per share in 1985. Diagnostic manufactures medical immunological diagnostic test kits. Ziering said he expects the earnings growth to result from positive effect of the weaker dollar on the company's exports sales as well as accelerated market penetration. Ziering said he expected the Food and Drug Administration to approve three more of its drug abuse test kits by the end of the year, which, depending on approval, should also help earnings growth. Ziering said as a result of the new tax laws he expected the company's taxes to decrease by five pct to 31 pct of net income in 1987.