Sample dated YBP:
>15000
>14000
>13000
>12000
>11000
>10000
>9000
>8000
>7000
>6000
>5000
>4500
>4000
>3500
>3000
>2500
>2400
>2300
>2200
>2100
>2000
>1900
>1800
>1700
>1600
>1500
>1400
>1300
>1200
>1100
>1000
>900
>800
>700
>600
>500
>0
BESbswy