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<br />%10s <br />3.0 <br />2.S <br />V <br />0 <br />L <br />U <br />n 2.e <br />E <br />I <br />N <br />A <br />C <br />R 1.S <br />E <br />F <br />E <br />E <br />T <br />1.0 <br />0.6 <br />0.0 <br />1920 <br />1930 1910 1950 1960 1970 <br />YEAR <br />ANNUAL VOLUME AND TEN YEAR RUNNING AVERAGE <br />Figure 10 <br />less <br />1990 <br />N <br />O <br /> r <br /> <br />