*Excludes Observations that spanned multiple years

Pre 1970152
197013
19717
19721
19739
19749
197526
19768
19779
197819
197912
198018
198115
19827
198312
198412
19856
19869
19876
198817
198914
199026
199126
199242
199324
199449
199546
199648
199747
199876
1999122
2000170
200197
2002136
200394
200472
200533
2006109
200787
200874
200940
201056
201153
2012151
2013115
2014153
2015143
2016232
2017104
2018102
201942
20205
2021117
2022155
202325
20249
Total3261