No predictions loaded for 2011. This site serves NOAA predictions from its own store, and this period has not been fetched for Jaffrey Point yet. Nothing is estimated or interpolated in its place. NOAA's own page for the station has the official table: tidesandcurrents.noaa.gov.
tidealmanac.site/us/nh/jaffrey-point-8424601/2011
Jaffrey Point, NH tide table 2011 (printable) · Tide Almanac