*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19761
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19902
19914
19921
19930
19942
19950
19963
19971
19980
19991
20000
20012
20020
20033
20041
20054
20069
20075
200820
200936
201025
201127
201227
201312
20145
201521
201612
20170
20180
20190
20203
20210
20221
20232
20241
Total233