*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19801
19810
19820
19832
19840
19850
19860
19870
19882
19895
19902
19915
19922
19935
199426
19952
19969
19973
199810
19992
20001
20014
20024
20033
200410
200520
20069
20073
20088
20095
201059
201160
201229
201319
201423
201530
201648
201720
20180
Total433