*Excludes Observations that spanned multiple years

Pre 1970106
19702
19715
197210
19730
19742
19752
19763
19771
19782
19794
19804
19812
19821
198311
19841
19856
198626
19877
198810
198925
199044
199157
199240
199320
19949
199547
199613
199748
199882
199938
20009
2001137
200279
200380
2004242
200571
2006199
200767
2008116
2009307
201081
2011193
201294
201343
2014111
201549
2016104
201783
201830
Total2723