y = 7.561/(1 + e^(-(x-(2.719))/2.421))
Inital zero points added:0
Inflexion point of curve:2004
acceleration counts pred pred_actual velocity y_norm year
0 0.122 2 1.856 11.353 0.578 0.668 2001
1 0.097 33 2.492 24.043 0.690 2.786 2002
2 0.047 98 3.223 55.057 0.764 3.782 2003
3 -0.019 198 4.000 129.014 0.778 4.421 2004
4 -0.078 341 4.758 292.775 0.729 4.909 2005
5 -0.114 562 5.441 605.733 0.630 5.366 2006
6 -0.124 865 6.011 1112.470 0.509 5.760 2007
7 -0.114 1370 6.459 1818.817 0.389 6.176 2008
8 -0.094 2014 6.794 2622.389 0.285 6.531 2009
9 -0.072 2986 7.036 3465.377 0.202 6.887 2010
10 -0.052 3810 7.205 4286.206 0.140 7.088 2011
11 -0.037 5069 7.322 5073.498 0.096 7.321 2012
12 -0.026 6326 7.401 5706.532 0.065 7.504 2013
13 -0.017 5822 7.455 4767.809 0.043 7.654 2014
14 -0.012 911 7.490 657.218 0.029 7.817 2015