*Excludes Observations that spanned multiple years

Pre 19701
19700
19714
19720
19731
19741
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19868
198781
198817
19894
19902
199175
199226
199318
19947
199542
199662
1997134
19987
199942
200033
200143
200219
20035
20047
20053
20062
20072
20084
20092
20105
20111
20122
20132
20141
20152
20166
20172
20186
20190
20200
20210
20220
20230
20240
Total679