div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader042vdocumentinreader042viewer20220306235aea7d1d7f8b9a585f8c70e0html5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: · b gone up and down but continues to trend down- ward c stayed steady over the last 10 years d dropped steadily from 1935 until … src=https:reader042vdocumentinreader042viewer20220306235aea7d1d7f8b9a585f8c70e0html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divdiv