*Excludes Observations that spanned multiple years

Pre 197028
19700
19710
19720
19730
19741
19750
19760
19770
19780
19790
19800
19811
19820
19830
19840
19850
19861
19870
19880
19890
19900
19910
19920
19931
19943
19950
19961
19971
19982
199915
200021
200120
200219
200347
200446
2005120
2006113
200725
20080
20091
201026
20113
20126
20137
20140
201528
201611
20174
20180
20190
20203
202127
20225
20230
20240
Total586