1 - 12: [0 .. 11]: 1 2 3 4 5 6 7 8 9 10 11 12
10 - 20: [9 .. 14.5]: 10 11 12 13 14 15
18 - 25: [15 .. 19]: 21 22 23 24 25
2000 - 3000: [1895 .. 1901.5]: 2000 2010 2011 2012 2013 2014 2015