*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19771
19781
19791
19800
19810
19820
19830
19840
19851
19860
19870
19881
19890
19905
19913
19924
19937
19949
199522
199634
199720
19984
19995
20001
20013
20028
20032
20041
20051
20061
20071
20081
20096
201012
201120
20123
201313
201411
20153
201613
201726
201818
20191
20204
20213
20225
20231
20240
Total277