Year	mm Hg
1980	116.6
1981	117
1982	117.4
1983	117.8
1984	118.2
1985	118.4
1986	118.7
1987	119
1988	119.4
1989	119.7
1990	120.1
1991	120.4
1992	120.8
1993	121.1
1994	121.4
1995	121.7
1996	122.1
1997	122.4
1998	122.7
1999	123
2000	123.3
2001	123.6
2002	124
2003	124.4
2004	124.8
2005	125.3
2006	125.7
2007	126.2
2008	126.6