*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19751
19760
19770
19781
19790
19800
19810
19821
19830
19840
19850
19863
19877
198828
19893
199012
19918
19922
19933
19944
199537
199629
199739
199821
199925
20009
200113
20021
20036
20048
200514
20061
20072
20084
20097
201014
20114
20120
201318
20148
20152
20167
20174
20184
20199
20205
20218
20222
20230
20240
Total377