*Excludes Observations that spanned multiple years

Pre 19704
19700
19717
19720
19730
19740
19750
19761
19770
19780
19791
19800
19811
19821
19830
19844
198538
198654
1987101
1988209
198968
199026
1991115
1992129
1993229
1994295
1995258
1996182
1997144
199825
199951
200056
200175
200231
200347
2004100
200563
200630
200746
200847
200940
201045
201154
201262
201371
201473
201552
201652
201747
201812
201981
20201
20210
20220
Total3028