Bill_length
48.1
56.8
48.0
53.4
57.8
56.3
62.4
50.8
60.2
57.1
55.2
50.1
59.8
61.1
48.8
55.8
51.8
51.0
56.0
61.8
59.9
56.8
59.2
52.3
59.3
56.5
56.2
55.6
57.7
52.5
47.8
61.5
55.8
57.5
56.8
47.0
50.4
58.0
61.2
56.5
59.3
59.2