Henry temperature
1993       -   -40.4   -50.6   -56.5   -55.7   -58.7   -57.8       -       -       -   -35.9   -26.1
1994   -25.8   -41.2   -51.9   -55.6   -56.9   -53.1   -58.2       -       -       -   -35.8   -26.2
1995   -28.3   -38.6   -50.1   -56.4   -58.1   -56.1   -53.0   -59.5       -       -   -35.6   -23.8
1996   -27.1   -35.9   -54.2   -54.1   -59.5   -58.4   -53.4   -51.6       -       -   -33.4   -23.3
1997   -26.4   -40.4   -52.2   -55.4   -57.2   -55.1   -63.7   -58.3       -       -   -32.0   -24.2
1998   -25.2   -36.1   -51.4   -60.2   -56.8   -54.8   -57.3   -60.4       -       -   -35.1   -25.1
1999   -23.4   -38.5   -53.2   -58.8   -56.2   -56.3   -60.3   -55.0       -       -   -36.7   -27.8
2000   -27.1   -40.6   -54.1   -59.9   -57.8   -57.2   -59.7   -59.0       -       -   -31.5   -24.1
2001   -25.6   -38.6   -53.8   -57.6   -56.9   -55.3   -58.1   -61.4       -       -   -32.3   -23.6
2002   -23.4   -38.3   -47.7   -52.2   -54.1   -58.8   -52.9   -55.7       -       -   -36.5   -27.0
2003       -       -       -       -       -       -   -61.7       -       -       -       -       -
2004       -       -       -       -       -       -       -       -       -       -       -       -
2005       -   -37.4   -51.1   -53.3   -57.6   -56.9   -60.2       -       -       -   -35.9   -21.1
2006   -24.8       -       -       -       -       -       -       -       -       -       -       -
2007       -       -       -       -       -       -       -       -       -       -       -       -
2008       -       -       -       -       -       -       -       -       -       -       -       -
2009       -       -       -       -       -       -       -       -       -       -       -       -