R version 2.13.0 (2011-04-13)
Copyright (C) 2011 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i486-pc-linux-gnu (32-bit)

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> x <- c(jan/07	69.116,feb/07	41.519,mrt/07	51.321,apr/07	38.529,mei/07	41.547,jun/07	52.073,jul/07	38.401,aug/07	40.898,sep/07	40.439,okt/07	41.888,nov/07	37.898,dec/07	8.771,jan/08	68.184,feb/08	50.530,mrt/08	47.221,apr/08	41.756,mei/08	45.633,jun/08	48.138,jul/08	39.486,aug/08	39.341,sep/08	41.117,okt/08	41.629,nov/08	29.722,dec/08	7.054,jan/09	56.676,feb/09	34.870,mrt/09	35.117,apr/09	30.169,mei/09	30.936,jun/09	35.699,jul/09	33.228,aug/09	27.733,sep/09	33.666,okt/09	35.429,nov/09	27.438,dec/09	8.170,jan/10	63.410,feb/10	38.040,mrt/10	45.389,apr/10	37.353,mei/10	37.024,jun/10	50.957,jul/10	37.994,aug/10	36.454,sep/10	46.080,okt/10	43.373,nov/10	37.395,dec/10	10.963,jan/11	76.058,feb/11	50.179,mrt/11	57.452,apr/11	47.568,mei/11	50.050,jun/11	50.856,jul/11	41.992,aug/11	39.284,sep/11	44.521,okt/11	43.832,nov/11	41.153,dec/11	17.100)
Error: unexpected numeric constant in "x <- c(jan/07   69.116"
Execution halted