Magnitude of Declines, from James Sogi
A back of the envelope count of declines the last few years and a glance at the 2000 era type swings shows recent down swing in line in magnitude.
1530-1437
[1] 93
1225-1143
[1] 82
1248-1171
[1] 77
1329-1246
[1] 83
1329-1229
[1] 100
1458-1368
[1] 90
1560-1442
[1] 118
av. 91.8