*Excludes Observations that spanned multiple years

Pre 197012
19700
19710
19720
19732
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
19850
19861
19870
19880
19890
19900
19911
19920
19930
19940
19951
19961
19970
19980
19991
20000
20010
20021
20031
20041
20051
20060
20071
20080
200926
20100
20113
201210
20134
20143
201511
201625
20170
20180
Total107