▁Phill ip ▁Morris ▁summar ised ▁the ▁to b acco ▁industry ' s ▁concern ▁about ▁the ▁effects ▁of ▁sm oking ▁b ans : ▁" Total ▁prohib ition ▁of ▁sm oking ▁in ▁the ▁work place ▁strongly ▁effects ▁ ▁to b acco ▁industry ▁volume . ▁Sm ok ers ▁facing ▁these ▁restrictions ▁consume ▁ 1 1 % – 1 5 % ▁less ▁than ▁average ▁and ▁quit ▁at ▁a ▁rate ▁that ▁is ▁ 8 4 % ▁higher ▁than ▁average ." ▁ ▁In ▁the ▁United ▁States , ▁the ▁CD C ▁reported ▁a ▁lev elling - off ▁of ▁sm oking ▁rates ▁in ▁recent ▁years ▁despite ▁a ▁large ▁number ▁of ▁ever ▁more ▁compreh ensive ▁sm oking ▁b ans ▁and ▁large ▁tax ▁increases . ▁It ▁has ▁also ▁been ▁suggested ▁that ▁a ▁" back stop " ▁of ▁hard core ▁sm ok ers ▁has ▁been ▁reached : ▁those ▁un mot iv ated ▁and ▁increasing ly ▁def i ant ▁in ▁the ▁face ▁of ▁further ▁legisl ation . ▁The ▁sm oking ▁ban ▁in ▁New ▁York ▁City ▁was ▁cred ited ▁with ▁the ▁reduction ▁in ▁adult ▁sm oking ▁rates ▁at ▁nearly ▁twice ▁the ▁rate ▁as ▁in ▁the ▁rest ▁of ▁the ▁country , ▁" and ▁life ▁expect ancy ▁has ▁clim bed ▁three ▁years ▁in ▁a ▁de cade ". ▁ ▁In ▁Sweden , ▁use ▁of ▁sn us , ▁as ▁an ▁alternative ▁to ▁sm oking , ▁has ▁ris en ▁stead ily ▁since ▁that ▁nation ' s ▁sm oking ▁ban . ▁ ▁Sm oking ▁restrictions ▁may ▁make ▁it ▁easier ▁for ▁sm ok ers ▁to ▁quit . ▁A ▁survey ▁suggests ▁ 2 2