Increasing levels of life expectancy have traditionally been accompanied by a compression of ages at death, leading to a rectangularization of the survival curve. This process seems however to have slowed down in Switzerland in the last years and some indicators such as the standard deviation of ages at death above the mode (SD+) even suggest a possible stagnation of the compression process in the first years of the new century. In this paper we will (1) test whether this trend continued in the last years, (2) decompose the changes into cause-of-death components. In order to perform the second analysis, we will accomplish a redistribution of ill-defined causes of death using the heterogeneity between the 26 regions (cantons). The data will come from the Swiss National Cohort, which collects all death records that take place in Switzerland and matches them with individual census data.