*Excludes Observations that spanned multiple years

Pre 197032
19700
19711
19720
19731
19740
19751
19761
19770
19781
19790
19801
19811
19820
19830
19840
19850
19860
19873
198821
198918
199047
199190
199217
199351
199454
1995167
1996242
1997242
199834
19997
20005
20019
200220
200385
200486
200598
200656
200765
200880
200978
201053
201153
2012134
2013335
2014453
2015374
2016290
20170
Total3306