<term><name>1992</name><frequency>2</frequency></term>
<term><name>1993</name><frequency>2</frequency></term>
<term><name>1997</name><frequency>2</frequency></term>
<term><name>1968</name><frequency>1</frequency></term>
<term><name>1972</name><frequency>1</frequency></term>
<term><name>1992</name><frequency>2</frequency></term>
<term><name>1993</name><frequency>2</frequency></term>
<term><name>1997</name><frequency>2</frequency></term>
<term><name>1968</name><frequency>1</frequency></term>
<term><name>1972</name><frequency>1</frequency></term>