*Excludes Observations that spanned multiple years

Pre 197028
19700
19710
19720
19730
19740
19752
19760
19772
19784
19792
19800
19810
19822
198311
19844
19855
19862
19871
19882
19890
19900
19911
19923
199311
19944
19952
199610
199714
19987
19994
200014
200117
200214
200317
200416
200519
200642
200714
20087
200921
2010110
2011108
2012103
201382
201480
201564
201684
201773
201866
201964
202053
202145
20225
20232
20240
Total1241