*Excludes Observations that spanned multiple years

Pre 19704
19700
19712
19721
19730
19740
19750
19760
19770
19780
19791
19801
19811
19820
198316
19842
19850
198629
198716
198833
198920
199018
199115
1992107
199368
199449
1995117
199640
199747
199859
199925
20008
200134
200224
20038
200488
2005120
200618
20078
200818
20095
20108
20117
20120
20130
20142
20156
201618
20170
Total1043