*Excludes Observations that spanned multiple years

Pre 197011
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19864
19876
198846
19898
19909
19916
199210
19933
19941
19951
19964
199710
19983
19995
20003
20011
20021
200324
200415
200513
200618
200718
200833
200935
201023
201113
201223
201331
201425
201528
201624
201716
201824
201940
202031
202136
20229
202315
202410
Total636