*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19865
19871
19880
19890
19904
199111
19928
19935
199410
199530
19967
199720
19981
199943
20000
20011
20021
20035
20045
20058
20063
20073
20083
20093
201059
201138
201215
201318
201419
201513
201615
201718
20180
Total375