*Excludes Observations that spanned multiple years

Pre 197010
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19860
19870
19880
19890
19904
199110
19921
19932
199432
199523
199628
19974
19981
19990
20001
20012
20021
20032
20048
200511
20066
20077
200818
200961
2010140
201152
201286
201344
201440
201533
201627
20170
20180
20190
20201
20210
20222
20230
20240
Total658