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              [html]<thead><tr><tdcolspan="2">Age</td><tdcolspan="2">Year of birth</td></tr></thead><tbody><tr><td>Number of tests</td><td>364.537</td><td>Number of tests</td><td>364.537</td></tr><tr><td>Mean</td><td>32</td><td>Mean</td><td>1977</td></tr><tr><td>Median</td><td>31</td><td>Median</td><td>1977</td></tr><tr><td>Mode</td><td>28</td><td>Mode</td><td>1979</td></tr><tr><td>Minimum</td><td>18</td><td>Minimum</td><td>1960</td></tr><tr><td>Maximum</td><td>53</td><td>Maximum</td><td>1995</td></tr></tbody>
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