*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19883
19890
19902
199135
19921
19934
19943
19955
19961
19973
19980
19994
20003
20010
20026
20037
20047
200514
20064
200716
20086
20092
20108
20112
20127
201313
20144
20155
20166
20172
20181
20191
20200
20210
20221
20230
20240
Total178