Data   DD  Gas
before 24  6.3
before 51 10.9
before 43  8.9
before 33  7.5
before 26  5.3
before 13  4.0
before  4  1.7
before  0  1.2
before  0  1.2
before  1  1.2
before  6  2.1
before 12  3.1
before 30  6.4
before 32  7.2
before 52 11.0
before 30  6.9
after  19  3.2
after   3  2.0
after   3  1.6
after   0  1.0
after   0  0.7
after   0  0.7
after   8  1.6
after  11  3.1
after  27  5.1
after  46  7.7
after  38  7.0
after  34  6.1
after  16  3.0
after   9  2.1
after   2  1.3
after   1  1.0
after   0  1.0
after   2  1.0
after   3  1.2
after  18  3.4
after  32  6.1
after  34  6.5
after  40  7.5