Because we found a difference in the number of births in 2015: lot packages move pin-1-16EO01, which caused a lot of move and pin lot: 2015-02-02EO01 move caused a small amount of pin.
Since we found no difference in the number of the pin move in your lot: 2015-01-16EO01 which the pin move a lot and lot: 2015-02-02EO01 the pin move a small amount.