“…A large and continuously increasing number of studies follow this path based on trends in life expectancy such as shown in Figure 2 (e.g. Chruscz, 1992;Dinkel, 1994Dinkel, , 1999Schott et al, 1994;Becker and Boyle, 1997;Gjonça et al, 2000;Bucher, 2002;Nolte et al, 2002;Luy, 2004aLuy, , 2004bLuy, , 2005bMai, 2004). Although many researchers are working on this subject, the rapid approximation of life expectancy is still not explained in full.…”