period abundance post 2.551171853 post 0.162573544 post 0.385792036 post 0.479418153 post 0.871921702 post 2.543638911 post 1.844253229 post 3.554197401 post 1.64898166 post 3.19165605 pre 0.491036478 pre 0.853068647 pre 0 pre 2.065876916 pre 1.907851974 pre 0.845273384 pre 0.081329428 pre 1.196760168 pre 1.815175894