Descriptive Statistics of the l'accroissement marmot number increasingBefore 1989, the number of marmots observed has varied from 37 to 48 marmots. From 1990 to 1999, the number of marmots observed has varied from 53 to 228 marmots. From 2000 to 2009, the number of marmots observed has varied from 204 to 497 marmots. Since 2010, the number of marmots observed has varied from 479 to 603 marmots. Period  Max Marmot Nb  Median  Mean  Theoretic Number  Increasing Rate  Doubling Time  Before 1989  48  42.5  42.5 ± 43.21  49  0.15  4.62  From 1990 to 1999  228  135.5  131.9 ± 67.95  918  0.33  2.1  From 2000 to 2009  497  297.5  336.9 ± 167.71  756  0.14  4.95  Since 2010  603  483.5  511.8 ± 234.31  606  0.04  17.33  2010 Forecast  594  483.5  xxx  594  0.06  1.21 

2020 Forecast  1106  xxx  xxx  1106  0.06  1.52 

Max Number of Marmots : it represents the maximum number of marmots observed during the related period. Median : it represents the median number m of marmots observed during the related period. Mean : it represents the mean number of marmots for the related period. Mean is completed by ± the standarderror. Theoretic Number : it represents the maximum theoretic number of marmots for the period, calculated by multiplying the starting number of marmots N by the increasing rate during the number of years n of the period: NT = N * (1+TA)^{n} Increasing Rate : the increasing rate by period TA is calculated by substracting the number of marmots M_{(t)} of the starting year from the number of the last year M_{(t+n)}. The increase [M_{(t+n)}  M_{(t)}] is related to the maximum number of marmots known during this period M_{(t)} * n (with n = number of yearss) : TA = [[M_{(t+n)}  M_{(t)}] / M_{(t)} * n Doubling Time: is the number of years necessary to have twice more marmots, in an hypothesis of linear increase. It is approximated by the formula TD = ln(2) / TA.
