1.
2000- 271 : 266 
coeff(GFv(USEC(),x),x,271) = 16965465344318
2004- 286 : 251 
coeff(GFv(USEC(),x),x,286) = 16196017263096
2008- 365 : 173
coeff(GFv(USEC(),x),x,365) = 3182416524832
2012- 332 : 206
coeff(GFv(USEC(),x),x,332) = 8628577597686
2016- 304 : 227
coeff(GFv(USEC(),x),x,304) = 13873406885786

2.
2000 - 47.9 : 48.4
(i) evalf(coeff(GFvp(USEC(), 484/(484 + 479), x), x, 270)) = 0.007538873826
(ii) evalf(add(seq(coeff(GFvp(USEC(), 484/(484 + 479), x), x, i), i = 270 .. 538))) = 0.5069967195

2004 - 5.07 : 4.83
(i) evalf(coeff(GFvp(USEC(), 507/(507 + 483), x), x, 270)) = 0.007497274336
(ii) evalf(add(seq(coeff(GFvp(USEC(), 507/(507 + 483), x), x, i), i = 270 .. 538))) = 0.5464029381

2008 - 5.29 : 4.57
(i) evalf(coeff(GFvp(USEC(), 529/(529 + 457), x), x, 270)) = evalf(coeff(GFvp(USEC(), 529/(529 + 457), x), x, 270))
(ii) evalf(add(seq(coeff(GFvp(USEC(), 529/(529 + 457), x), x, i), i = 270 .. 538))) = 0.6445533539

2012 - 5.11 : 4.72
(i) evalf(coeff(GFvp(USEC(), 511/(511 + 472), x), x, 270)) = 0.007411975346
(ii) evalf(add(seq(coeff(GFvp(USEC(), 511/(511 + 472), x), x, i), i = 270 .. 538))) = 0.5780307624

2016 - 4.61 : 4.82
(i) evalf(coeff(GFvp(USEC(), 461/(461 + 482), x), x, 270)) = 0.007473511433
(ii) evalf(add(seq(coeff(GFvp(USEC(), 461/(461 + 482), x), x, i), i = 270 .. 538))) = 0.4501744771


3.
SimuCount(USEC(),3/10,2000,4) = 
[160.3420000, 46.93465708, 0.2572120209, 2.870733857], 0.4255000000
[162.0740000, 47.24771448, 0.3352394428, 2.930481450], 0.4300000000
[161.4625000, 46.96806995, 0.2351930912, 2.772780351], 0.4240000000
[161.0045000, 46.76513103, 0.3038229920, 2.843617488], 0.4180000000
evalf(StatAnal(GFvp(USEC(),3/10,x),x,4)) = [161.4000000, 46.65683230, 0.2695069204, 2.844567676]

SimuCount(USEC(),2/5,2000,4) = 
[213.4080000, 49.78047344, 0.1441080604, 2.788527410], 0.2430000000
[214.6360000, 49.35590647, 0.2253653025, 2.946951567], 0.2390000000
[214.3430000, 49.60739210, 0.06655853647, 2.787134903], 0.2585000000
[216.2240000, 51.00418438, 0.1482463471, 2.807969737], 0.2550000000
evalf(StatAnal(GFvp(USEC(),2/5,x),x,4)) = [215.2000000, 49.87825176, 0.1260503198, 2.769840597]

SimuCount(USEC(),1/2,2000,4) = 
[268.1920000, 51.22581513, 0.01427125685, 2.734577033], 0.1515000000
[268.0835000, 50.82377915, -0.03668535393, 2.707650590], 0.1490000000
[269.6540000, 50.48810042, -0.0001554311348, 2.776425044], 0.1585000000
[269.6275000, 49.90066877, -0.04058111458, 2.743066329], 0.1540000000
evalf(StatAnal(GFvp(USEC(),1/2,x),x,4)) = [269., 50.90677755, 0., 2.748917015]

SimuCount(USEC(),3/5,2000,4) = 
[322.1280000, 50.02645916, -0.06589511207, 2.750248187], 0.2295000000
[323.2475000, 49.49598210, -0.1272400168, 2.767226554], 0.2260000000
[324.3695000, 49.57697016, -0.1475465724, 2.946260076], 0.2375000000
[322.6970000, 50.92324803, -0.1291425975, 2.712498244], 0.2495000000
evalf(StatAnal(GFvp(USEC(),3/5,x),x,4)) = [322.8000000, 49.87825176, -0.1260503198, 2.769840597]

SimuCount(USEC(),7/10,2000,4) = 
[376.3240000, 46.58135920, -0.3607961841, 3.060134777], 0.4290000000
[376.8835000, 46.99931838, -0.3445473561, 2.737808190], 0.4075000000
[375.0855000, 45.89525236, -0.3073108180, 2.858190759], 0.4015000000
[377.1015000, 45.91148220, -0.3188224140, 2.915170550], 0.4285000000
evalf(StatAnal(GFvp(USEC(),7/10,x),x,4)) = [376.6000000, 46.65683230, -0.2695069204, 2.844567676]

The values are pretty similar.