*Excludes Observations that spanned multiple years

Pre 1970127
19701
19711
19721
19731
19747
19755
197610
19772
19780
19798
19805
19819
19821
19836
19840
19851
198622
198717
1988276
198919
19909
199135
199280
199386
1994161
1995133
199656
199797
19986
19993
20004
200124
200255
200382
200492
200584
200683
200788
200896
200981
2010168
2011160
201295
2013115
2014116
2015104
2016143
2017149
201877
2019110
2020109
2021120
2022243
202365
202417
Total3665